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 A221974 #18 Apr 21 2013 03:56:26
%S A221974 187,213,299,316,364,379,437,454,478,486,509,580,607,620,644,670,694,
%T A221974 696,717,752,795,846,850,871,884,890,906,923,937,939,944,966,986,997,
%U A221974 1030,1045,1048,1096,1135,1150,1158,1167,1181,1209,1229,1233,1239,1252,1272
%N A221974 Numbers n such that A161914(n) = 0.
%C A221974 Sequence related to nontrivial zeros of Riemann zeta function.
%F A221974 a(n) ~ n. There are constants N and k such that for all n > N, a(n) = n + k. - _Charles R Greathouse IV_, Apr 18 2013
%t A221974 Position[Table[Round@Im[ZetaZero[n] - ZetaZero[n - 1]], {n, 2, 509}], 0] + 1 // Flatten (* _Arkadiusz Wesolowski_, Feb 05 2013 *)
%Y A221974 Cf. A002410, A161914, A208436.
%K A221974 nonn
%O A221974 1,1
%A A221974 _Omar E. Pol_, Feb 02 2013
%E A221974 a(35)-a(49) from _Arkadiusz Wesolowski_, Feb 05 2013