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 A097697 #15 Jan 14 2025 23:27:55 %S A097697 1,2,4,5,7,11,14,19,25,26,31,32,35,37,38,46,47,53,56,61,65,67,70,73, %T A097697 77,79,80,86,89,109,115,121,122,124,128,137,143,149,152,158,161,163, %U A097697 170,175,178,182,184,199,203,208,212,215,217,220,229,235,236,242,254,256 %N A097697 Numbers k such that 4*k^2 + 3 is prime. %o A097697 (Magma) [n: n in [1..1000] |IsPrime(4*n^2+3)]; // _Vincenzo Librandi_, Nov 16 2010 %o A097697 (PARI) is(n)=isprime(4*n^2+3) \\ _Charles R Greathouse IV_, Jun 05 2017 %Y A097697 Cf. A083022, A097698. %K A097697 easy,nonn %O A097697 1,2 %A A097697 _Carl R. White_, Aug 20 2004