##05AB1E, 7 bytes, score = 0.571 (4/7), Cracked##
05AB1E, 7 bytes, score = 0.571 (4/7), Cracked
0s·Ì3c;
Computes: A006331
After golfing 5 unique versions of this sequence before finding this public version I hope I haven't left any obvious improvement out there so it'll at least be a challenge for the robbers.