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 A001166 M3215 N1301 #37 Jan 21 2024 09:28:14 %S A001166 1,4,3,11,15,13,17,24,23,73,3000,11000,15000,101,104,103,111,115,113, %T A001166 117,124,123,173,323,373,1104,1103,1111,1115,1113,1117,1124,1123,1173, %U A001166 1323,1373,3323,3373,11373,13323,13373,17373,23323,23373,73373,101123,101173,101323,101373,103323,103373,111373,113323,113373,117373 %N A001166 Smallest natural number requiring n letters in English. %C A001166 In this version 101 is written "one hundred and one", etc. %D A001166 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %D A001166 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A001166 Sean A. Irvine, <a href="/A001166/a001166.out.txt">Illustration of terms a(3) through a(75)</a> %e A001166 For n = 6, the smallest natural number requiring 6 letters in English is "eleven." - _Julia Carrigan_, Jan 19 2024 %Y A001166 Cf. A000916, A014388, A045494, A045495, A080777. %K A001166 word,nonn %O A001166 3,2 %A A001166 _N. J. A. Sloane_ %E A001166 Corrected and extended by _Henry Bottomley_, Jan 28 2000 %E A001166 Further corrected and extended by _Brian Galebach_, Feb 06 2004 %E A001166 Further corrected and illustration of terms by _Sean A. Irvine_, Mar 12 2012