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 A190556 #8 Jun 04 2020 06:40:57 %S A190556 17,29,58,87,99,128,157,169,198,227,256,268,297,326,338,367,396,425, %T A190556 437,466,495,507,536,565,577,594,606,635,664,676,705,734,746,775,804, %U A190556 833,845,874,903,915,944,973,985,1002,1014,1043,1072,1084,1113,1142,1154,1183,1212,1241,1253,1282,1311 %N A190556 Positions of 0 in A190555. %C A190556 See A190555. %t A190556 (See A190555.) %Y A190556 Cf. A190555. %K A190556 nonn %O A190556 1,1 %A A190556 _Clark Kimberling_, May 12 2011