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 A217418 #14 May 09 2021 02:18:31 %S A217418 20,6,30,15,4,7,38,57,364,673 %N A217418 13-adic valuations of terms of A217416. %C A217418 A216416 consists of numbers of the form (2^r)*(13^s). This sequence corresponds to the values of s. %Y A217418 Cf. A217416, A217417. %K A217418 nonn,base,less,more %O A217418 1,1 %A A217418 _James G. Merickel_, Oct 03 2012