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 A091273 #12 Aug 02 2021 12:16:12 %S A091273 3,16,24,65,77,137,170,227,273,341,392,532,654,792,833,1017,1645,1686, %T A091273 1948,2456,2757,2818,3210,3550,4203,4589,4898,5317,5397,5482,5743, %U A091273 6186,6364,6636,6735,6822,7205,7300,8198,8598,8713,8820,9683,10920,11040,11521,11997 %N A091273 Indices of primes of the form k^2 - 11. %C A091273 A091272 indexed by A000040. %F A091273 a(n)=j such that A000040(j)=A091272(n). %t A091273 Select[Range[12000],IntegerQ[Sqrt[Prime[#]+11]]&] (* _Harvey P. Dale_, Jan 16 2011 *) %Y A091273 Cf. A090696, A091271, A091272. %K A091273 nonn %O A091273 1,1 %A A091273 _Ray Chandler_, Dec 27 2003 %E A091273 Offset changed to 1 by _Jinyuan Wang_, Aug 02 2021