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 A045494 #8 Jan 28 2016 05:39:31 %S A045494 1,1,1,3,3,11,13,13,17,23,23,73,101,103,103,111,113,113,117,123,123, %T A045494 173,323,373,1103,1103,1111,1113,1113,1117,1123,1123,1173,1323,1373, %U A045494 3323,3373,11373,13323,13373,17373,23323,23373,73373,101373,103323 %N A045494 Smallest positive integer requiring at least n letters (not including hyphens) when spelled out in English. %C A045494 Assumes British definition of billion, trillion. Also assumes no 'and' is used to spell integers. %Y A045494 Cf. A000916, A001166, A014388, A045494, A045495, A045495, A167509. %K A045494 nonn,word %O A045494 1,4 %A A045494 _Brian Galebach_ %E A045494 Added "at least" in definition _M. F. Hasler_, Nov 18 2009