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 A308887 #5 Jul 01 2019 22:56:45 %S A308887 7,8,13,14,16,19,23,29,43,50,51,53,57,62,73,74,77,83,91,92,97,98,102, %T A308887 103,104,105,106,107,113,116,117,119,127,129,135,140,157,163,170,171, %U A308887 173,177,179,183,194,212,221,227,242,245,247,248,250,253,257,258,259,260,262,263,264 %N A308887 Positions of 2's on the spiral defined in A308884. %Y A308887 Cf. A308884-A308895. %K A308887 nonn %O A308887 1,1 %A A308887 _N. J. A. Sloane_, Jul 01 2019