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 A217430 #11 Jun 02 2025 08:09:08 %S A217430 8,1,9,23,5,6,11,60,111,159 %N A217430 19-adic valuation of A217428. %C A217430 A217428 consists of numbers of the form (2^r)*(19^s). This sequence holds the s values. %Y A217430 Cf. A217428, A217429. %K A217430 nonn,base,less %O A217430 1,1 %A A217430 _James G. Merickel_, Oct 03 2012