Python 3, A000002, Cracked with the intended solution
These are the bytes of a full program, 0-indexed solution for the Kolakoski sequence: OEIS A000002.
pg*rn:e+%2a tu]
(=foi[)1l,
This contains a space, a newline, and all the other characters in the snippet above. Hopefully this won't be too easy to crack :)