fixed and unfuged test for chained infinite numeric sequence

The test obviously missed the constraint for the first ten elements [^10].
After adding this and after s#1/4 1/2#0.25 0.5# in the expected output the test passes.
Both changes are in analogy to the test directly above 'chained infinite numeric sequence'

If I should better leave the test as it was and open a ticket first, please let me know.