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 A155736 #10 Sep 08 2022 08:45:41 %S A155736 1,2,3,4,5,8,10,12,13,14,15,19,22,23,24,25,27,28,30,32,33,34,35,38,43, %T A155736 47,48,50,57,60,63,65,67,69,70,72,74,77,79,80,82,87,88,90,92,93,94,98, %U A155736 103,109,110,115,118,120,122,123,124,129,132,134,144,145,147,148,149 %N A155736 Numbers n such that 4*n^2+2*n-1 is a prime. %H A155736 Vincenzo Librandi, <a href="/A155736/b155736.txt">Table of n, a(n) for n = 1..1000</a> %t A155736 Select[Range[0, 200], PrimeQ[4#^2+2#-1]&] (* _Vincenzo Librandi_, Sep 24 2012 *) %o A155736 (Magma) [n: n in [0..150] | IsPrime(4*n^2+2*n-1)]; // _Vincenzo Librandi_, Sep 24 2012 %Y A155736 Cf. A155737, A155738. %K A155736 nonn,easy %O A155736 1,2 %A A155736 _Vincenzo Librandi_, Jan 26 2009 %E A155736 Edited by _N. J. A. Sloane_, Jun 25 2010