05AB1E, 5 bytes, cracked
I hope that this submission isn't as easy as my other ones :p. Outputs:
a(0) = 0 a(1) = 1 a(2) = 6 a(3) = 24 a(4) = 80 a(5) = 240 Obfuscated code:
####O Contains some non-ASCII characters though, uses CP-1252 encoding.
Try it online! might come in handy :p.