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 A213718 #9 Nov 05 2012 13:57:09 %S A213718 1,2,2,3,4,4,4,5,6,6,6,7,7,7,7,8,9,9,9,10,10,10,10,11,11,11,12,12,12, %T A213718 12,12,13,14,14,14,15,15,15,15,16,16,16,17,17,17,17,18,18,18,19,19,19, %U A213718 19,20,20,20,20,21,21,21,21,21,21,22,23,23,23,24,24,24 %N A213718 n occurs A213712(n) times. %C A213718 Useful when computing A213719. %o A213718 (Scheme with _Antti Karttunen_'s Intseq-library): (define A213718 (LEAST-GTE-I 1 1 A179016)) %K A213718 nonn %O A213718 1,2 %A A213718 _Antti Karttunen_, Nov 01 2012