Question: Randy Van Horne, was an American singer and musician, his musical group performed the theme song, for which animated television series, that first ran on September 27, 1961?

Context articles: Eastwick (TV series)
Randy Van Horne
Maricarmen Marín
List of Rage of Bahamut episodes
Kalles klätterträd
Top Cat
List of The Seven Deadly Sins episodes
Zanna
Disney's Adventures of the Gummi Bears
Rhythm Orchestra (Hartford/ Springfield)

Eastwick is an American fantasy comedy-drama television series based on John Updike's novel "The Witches of Eastwick" which aired on ABC from September 23 until December 30, 2009.
 The series was developed by Maggie Friedman, and starred Paul Gross as the infamous Darryl Van Horne, alongside Jaime Ray Newman, Lindsay Price, and Rebecca Romijn as the eponymous witches.
Randy Van Horne (February 10, 1924 – September 26, 2007) was an American singer and musician.
 Van Horne's musical group, the Randy Van Horne Singers, performed the theme songs for many classic Hanna-Barbera cartoons including "The Flintstones", "Top Cat", "The Jetsons", and "The Huckleberry Hound Show".
Maricarmen Marín Salinas is a Peruvian actress, cumbia singer and dancer, and TV host.
 She started as a dancer in the musical show ""La movida de los Sabados"" and she became famous as the lead singer of the female technocumbia musical group "Agua Bella".
 Maricarmen participated in "El Gran Show" in 2010.
 In 2011 she currently stars as Natasha in the America Television series ""Yo no me llamo Natacha"" (English: "My name is not Natacha") for which she also performed the theme song.
 She is also currently a solo singer.
Rage of Bahamut (神撃のバハムート , Shingeki no Bahamut ) is a Japanese anime television series produced by MAPPA that is based on the "Rage of Bahamut" game.
 The anime aired between October 6, 2014 and December 29, 2014 for 12 episodes.
 On May 6, 2015, a second season was announced at the series' orchestra concert event.
 Titled Rage of Bahamut: Virgin Soul (神撃のバハムート VIRGIN SOUL , Shingeki no Bahamut: Virgin Soul ) , it premiered on April 7, 2017.
 The opening theme song "EXiSTENCE" is performed by SiM, while the ending theme song "Promised Land" is performed by Risa Shimizu.
 For season 2, the first opening theme song is "LET iT END" by SiM while the first ending theme song is "Haikei Goodbye Sayonara" (拝啓グッバイさようなら , lit.
 Greetings, Goodbye, Farewell) by DAOKO.
 The second opening theme is "Walk This Way" by THE BEAT GARDEN, while the second ending theme is "Cinderella Step" by DAOKO.
Kalles klätterträd (""Kalle's climbing tree"") is a Swedish animated television series from 1975 by Olof Landström and Peter Cohen, produced by Poj film production.
 The musical theme song is performed by Jojje Wadenius and narration done by Toivo Pawlo.
 The program was recorded in a total of twelve sections of about 8 minutes, and the first broadcast on Sveriges Television on 25 December 1975.
 The program is one of the best known Swedish children's programs of the 1970s, partly because of the theme song.
 It aired on Nickelodeon in the early to mid 1980s as part of Pinwheel.
Top Cat is an American animated television series made by the Hanna-Barbera studios that first ran from September 27, 1961 to April 18, 1962 for a run of 30 episodes on the ABC network.
The Seven Deadly Sins is a Japanese manga series written and illustrated by Nakaba Suzuki.
 The series debuted on MBS and other Japan News Network stations on October 5, 2014.
 The series follows Elizabeth, the third princess of the Kingdom of Liones, who is in search of the Seven Deadly Sins, a group of former Holy Knights who were disbanded after the kingdom was overthrown.
 She enlists the help of Meliodas and Hawk, the captain of the Seven Deadly Sins and his talking pet pig, to assemble the remaining members of the Seven Deadly Sins and take back the kingdom from the Holy Knights.
 The show's first opening theme song is "Netsujō no Spectrum" (熱情のスペクトラム , Netsujō no Supekutoramu , "Spectrum of Passion") performed by Ikimono-gakari for the first twelve episodes and the second opening theme is "Seven Deadly Sins" performed by Man with a Mission, while the first ending theme titled "7-Seven" is a collaboration between Flow and Granrodeo, the second ending theme from episode thirteen onwards is "Season" the major label debut of Alisa Takigawa.
 A second season of the anime series was confirmed on September 27, 2015, to air in 2018.
"Zanna" is a song originally written and performed by Belgian musician Luc Van Acker and American singer Anna Domino in 1984.
 A successful cover was performed by Belgian musician and songwriter Selah Sue, Tom Barman and The Subs.
 This version was released on 25 November 2011 as a digital download in Belgium.
 It is the theme song for the charity event "Music for life 2011".
 In 2012 the song made a comeback due to the success it had with "Music for Life".
 Luc Van Acker performed at the Suicker Rock festival with a 14-year-old girl who was named after the song "Zanna".
 Luc Van Acker has previously met the family in 1998 after having made a remix using the sound of her heartbeat in vitro.
 However, in 2012, music brought the two back together after having found Zanna Ramaekers 's A cappella cover of "Zanna" on YouTube.
 They performed on the stage at SuickerRock and at a Belgian national TV show VillaVanthilt.
Disney's Adventures of the Gummi Bears is an American animated television series that first aired in the United States from 1985 to 1991.
 The series was the first animated production by Walt Disney Animation Television, and loosely inspired by the gummy bear candies; Disney CEO Michael Eisner was struck with inspiration for the show when his son requested the candies one day.
 The series premiered on NBC on September 14, 1985, and aired there for four seasons.
 The series moved to ABC for one season from 1989 to 1990 (airing alongside "The New Adventures of Winnie the Pooh" as the "Gummi Bears-Winnie the Pooh Hour"), and concluded on September 6, 1991 as part of the Disney Afternoon television syndication package.
 Of the series' 65 shows, 30 were double-features, consisting of two 11-minute cartoons, thereby bringing the series total to 94 distinct episodes overall.
 The show is well-remembered for its theme music, written by Michael and Patty Silversher and creation of "gummiberry juice" which was a type of magic potion, granting abilities, which allowed them to bounce away from their hunters.
 The theme song was performed by Joseph Williams, son of composer John Williams and one-time lead singer of Toto.
The Rhythm Orchestra Teraz Rhythm band was a Polish musical group that was active from the early 1970s to early 1990s in New England and eastern Canada.
 The group performed a wide range of folk and popular music styles including polka, oberek, waltz, rock (medium and slow), country, tango, cha-cha-cha, foxtrot, swing, and rumba.
 As a favorite among the Polish diaspora or Polonia of the Greater Hartford, Connecticut and Springfield, Massachusetts region, the group played at dances, weddings, picnics, festivals, and anniversaries which were frequently held at venues such the Polish National Home in Hartford, Connecticut, Gen. Haller Post 111 and the Falcons Nest 88 in New Britain, Connecticut, Polish National Alliance Park in Wallingford, Connecticut, and Piłsudski Park in Holyoke, Massachusetts.
 The group's first record album, "Our Homeland", was released in 1972 on the Holyoke based Rex Records label, which was founded by Joe "Papa" and Wanda Chesky, parents of Polka Hall of Famer Larry Chesky.
 Subsequent albums were released on the group's own record label, Wisła Records, which was based in Newington, Connecticut, and Westfield, Massachusetts.
 Four out five of the group's original members were born in Poland where their musical interests began.