Simplify the following text for a Grade 10 native English-speaking person.
Original: The On-Line Encyclopedia of Integer Sequences ( OEIS ) , also known as Sloane 's , is an large searchable database .
Simplified: The On-Line Encyclopedia of Integer Sequences ( OEIS ) , also cited simply as Sloane 's , is an online database of integer sequences , created and maintained by N. J. A. Sloane , a researcher at AT&T Labs .