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 A308893 #5 Jul 01 2019 23:06:46 %S A308893 8,9,14,15,17,20,24,30,44,51,52,54,58,63,74,75,78,84,92,93,98,99,103, %T A308893 104,105,106,107,108,114,117,118,120,128,130,136,141,158,164,171,172, %U A308893 174,178,180,184,195,213,222,228,243,246,248,249,251,254,258,259,260,261,263,264,265,266 %N A308893 Positions of 2's on the spiral defined in A308890. %C A308893 Add 1 to the terms of A308887. %Y A308893 Cf. A308884-A308895. %K A308893 nonn %O A308893 1,1 %A A308893 _N. J. A. Sloane_, Jul 01 2019