This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A274514 #9 Jun 29 2016 03:00:14 %S A274514 1,0,3,1,2,3,2,7,5,6,12,15,6,4,14,3,11,11,18,8,12,19,18,6,12,18,19,11, %T A274514 21,10,19,29,8,26,16,4,38,21,23,39,14,42,40,30 %N A274514 a(n) is the only number m such that 12^(2^m) + 1 is divisible by A273950(n). %o A274514 (PARI) forstep(p=3, 10^15, 2, if(!Mod(p, 3)==0, if(isprime(p), o=znorder(Mod(12, p)); x=ispower(2*o); if(2^(x-1)==o, print1(x-2, ", "))))); %Y A274514 Cf. A273950. %K A274514 nonn,more %O A274514 1,3 %A A274514 _Arkadiusz Wesolowski_, Jun 25 2016