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 A217417 #8 Sep 07 2014 08:20:49 %S A217417 10,88,9,65,108,100,19,5,2114,1043 %N A217417 2-adic valuation of A217416. %C A217417 A217416 consists of numbers of the form (2^r)*(13^s) that have each digit 0-9 a prime number of times in the decimal representation. This sequence corresponds to the values r. See that sequence for further comments. %Y A217417 Cf. A217416, A217418. %K A217417 nonn,base,less %O A217417 1,1 %A A217417 _James G. Merickel_, Oct 03 2012