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Search: id:A126891
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| A126891 |
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Number of letters in the English name of n, excluding spaces and hyphens, and all integers preceding it. |
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+0
1
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| 4, 7, 10, 15, 19, 23, 26, 31, 36, 40, 43, 49, 55, 63, 71, 78, 85, 94, 102, 110, 116, 125, 134, 145, 155, 165, 174, 185, 196, 206, 212, 221, 230, 241, 251, 261, 270, 281, 292, 302, 307, 315, 323, 333, 342, 351, 359, 369, 379, 388, 393, 401, 409, 419, 428, 437
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Partial sums of A005589(n).
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EXAMPLE
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If we write out: "zero one two three," there are 15 letters in total, so a(3)=15.
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MATHEMATICA
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lst = { (* the terms of A005589 *) }; Rest@ FoldList[ #1 + #2 &, 0, lst] (* Robert G. Wilson v (rgwv@rgwv.com), Aug 28 2007 *)
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CROSSREFS
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Cf. A005589.
Sequence in context: A064368 A026372 A014690 this_sequence A095875 A071408 A137461
Adjacent sequences: A126888 A126889 A126890 this_sequence A126892 A126893 A126894
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KEYWORD
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nonn,word
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AUTHOR
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Jonathan R. Love (japanada11(AT)yahoo.ca), Mar 23 2007
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