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 A147876 #8 Oct 05 2019 04:43:39 %S A147876 4,1000000000000,5,2,0,9,20,8,3,-1,-1,1000,1000,1,0,7,4,0,3,3,1,20,-1, %T A147876 2,-1,0 %N A147876 Smallest nonnegative integer containing the n-th letter of the alphabet (in French), or -1 if no such number exists. %C A147876 There is no known number that contains letters J, K, W or Y in French. %C A147876 This is assuming the use of the long scale for large numbers. %H A147876 Wikipedia, <a href="http://fr.wikipedia.org/wiki/%C3%89chelles_longue_et_courte">Long and short scale</a>. [From _Daniel Mondot_, Nov 21 2008] %Y A147876 Cf. A111098. %K A147876 fini,full,sign,word %O A147876 1,1 %A A147876 _Daniel Mondot_, Nov 16 2008