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 A191157 #9 May 31 2022 14:55:34 %S A191157 1,6,16,26,36,46,66,76,106,136,186,196,226,266,306,316,356,406,426, %T A191157 546,556,586,676,746,786,796,906,916,946,996,1066,1216,1226,1266,1276 %N A191157 Integers in (2+A191117)/3; contains A191117 as a proper subsequence. %C A191157 See A191117. %t A191157 (* See A191117. *) %Y A191157 Cf. A191117, A191113. %K A191157 nonn %O A191157 1,2 %A A191157 _Clark Kimberling_, May 27 2011