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 A090687 #18 Sep 08 2022 08:45:12
%S A090687 7,97,151,487,601,727,2647,3457,4057,7351,9127,9601,11617,12697,14407,
%T A090687 15607,17497,20887,21601,29401,33751,37447,39367,42337,47527,53017,
%U A090687 54151,71287,77977,80737,84967,95257,102967,110977,126151,142297,151687
%N A090687 Primes of the form 6*k^2 + 1.
%C A090687 Subset of A002476. See also A121326. The values of k for which 6*k^2 + 1 is prime are 1, 4, 5, 9, 10, 11, 21, 24, 26, 35, 39, 40, 44, 46, 49, 51, 54, 59, 60, 70, 75, 79, 81, 84, 89, 94, 95, 109, 114, 116, 119, 126, 131, 136, 145, 154, ... - _Jonathan Vos Post_, Aug 27 2006
%H A090687 Vincenzo Librandi, <a href="/A090687/b090687.txt">Table of n, a(n) for n = 1..5000</a>
%t A090687 Select[Table[6n^2+1,{n,0,1000}],PrimeQ] (* _Vincenzo Librandi_, Dec 03 2011 *)
%o A090687 (PARI) mx2pmp(n) = { for(x=1,n, y = 6*x^2+1; if(isprime(y),print1(y",")) ) }
%o A090687 (Magma) [a: n in [0..600] | IsPrime(a) where a is 6*n^2+1]; // _Vincenzo Librandi_, Dec 03 2011
%Y A090687 Cf. A000040, A002476, A090686.
%K A090687 easy,nonn
%O A090687 1,1
%A A090687 _Cino Hilliard_, Dec 18 2003
%E A090687 Edited by _N. J. A. Sloane_ at the suggestion of _R. J. Mathar_, Apr 14 2008