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 A060403 #18 Jul 30 2024 18:37:45 %S A060403 1,4,8,13,21,30,36,45,54,63,73,85,95,105,119,137,158,178,200,210,223, %T A060403 244,263,283,304,320,338,361,381,402,416,434,455,475,497,519,538,560, %U A060403 576,597,619,637,658,678,700,712,730,748,770,789,811,829,851,871,893 %N A060403 Each term is the previous term plus the number of letters in the previous number, as conventionally spelled out in American English. %C A060403 Increases more slowly than A160395 since American English does not use 'and' to separate hundreds from the rest of the number. E.g., 619 = "six hundred nineteen" in American English but "six hundred and nineteen" in British English. - _Carl R. White_, May 12 2009 %D A060403 GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See pages 49 and 214. %H A060403 Michael De Vlieger, <a href="/A060403/b060403.txt">Table of n, a(n) for n = 1..10001</a> %e A060403 a(2)=4 because a(1)=1 and 4 is 1 plus the number of letters in "one," 3. %t A060403 NestList[#+Length[Select[Characters[IntegerName[#,"Words"]],LetterQ ]]&,1,54] (* _James C. McMahon_, Jul 30 2024 *) %Y A060403 Cf. A005589 See A139097 for another version. %Y A060403 For British English see A160395. - _Carl R. White_, May 12 2009 %K A060403 nonn,word,easy %O A060403 1,2 %A A060403 Kevin Langdon (kevin.langdon(AT)polymath-systems.com), Apr 05 2001 %E A060403 More terms from _Carl R. White_, May 12 2009