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A060403
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Each term is the previous term plus the number of letters in the previous number, as conventionally spelled out in American English.
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7
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1, 4, 8, 13, 21, 30, 36, 45, 54, 63, 73, 85, 95, 105, 119, 137, 158, 178, 200, 210, 223, 244, 263, 283, 304, 320, 338, 361, 381, 402, 416, 434, 455, 475, 497, 519, 538, 560, 576, 597, 619, 637, 658, 678, 700, 712, 730, 748, 770, 789, 811, 829, 851, 871, 893
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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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
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REFERENCES
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GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See pages 49 and 214.
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LINKS
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EXAMPLE
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a(2)=4 because a(1)=1 and 4 is 1 plus the number of letters in "one," 3.
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CROSSREFS
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KEYWORD
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nonn,word,easy
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AUTHOR
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Kevin Langdon (kevin.langdon(AT)polymath-systems.com), Apr 05 2001
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EXTENSIONS
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STATUS
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approved
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