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 A161405 #10 Sep 20 2020 09:34:26 %S A161405 4,1000000000000,0,2,0,-1,-1,8,5,-1,-1,1000,1000,1,-1,0, %T A161405 1000000000000000000000000000000000000000000,15,0,2,3,1,9,-1, %U A161405 1000000000000000000000000000000000000,31,10 %N A161405 Smallest nonnegative integer containing the n-th letter of the alphabet (in Spanish), or -1 if no such number exists. %C A161405 There is no known number that contains letters F, G, J, K, Q or W in Spanish %e A161405 a(8) = 8 (ocho), the smallest number whose name contains 'h'. %Y A161405 Cf. A111098. %K A161405 fini,full,word,sign %O A161405 1,1 %A A161405 _Claudio Meller_, Jun 09 2009 %E A161405 a(8) and a(17) corrected by _Álvar Ibeas_, Sep 20 2020