%I #18 Jul 30 2024 18:37:45
%S 1,4,8,13,21,30,36,45,54,63,73,85,95,105,119,137,158,178,200,210,223,
%T 244,263,283,304,320,338,361,381,402,416,434,455,475,497,519,538,560,
%U 576,597,619,637,658,678,700,712,730,748,770,789,811,829,851,871,893
%N Each term is the previous term plus the number of letters in the previous number, as conventionally spelled out in American English.
%C 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 GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See pages 49 and 214.
%H Michael De Vlieger, <a href="/A060403/b060403.txt">Table of n, a(n) for n = 1..10001</a>
%e a(2)=4 because a(1)=1 and 4 is 1 plus the number of letters in "one," 3.
%t NestList[#+Length[Select[Characters[IntegerName[#,"Words"]],LetterQ ]]&,1,54] (* _James C. McMahon_, Jul 30 2024 *)
%Y Cf. A005589 See A139097 for another version.
%Y For British English see A160395. - _Carl R. White_, May 12 2009
%K nonn,word,easy
%O 1,2
%A Kevin Langdon (kevin.langdon(AT)polymath-systems.com), Apr 05 2001
%E More terms from _Carl R. White_, May 12 2009