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A126891 Number of letters in the English name of n, excluding spaces and hyphens and all integers preceding it. 0
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; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Partial sums of A005589(n).
LINKS
EXAMPLE
If we write out: "zero one two three," there are 15 letters in total, so a(3)=15.
MATHEMATICA
lst = { (* the terms of A005589 *) }; Rest@ FoldList[ #1 + #2 &, 0, lst] (* Robert G. Wilson v, Aug 28 2007 *)
CROSSREFS
Cf. A005589.
Sequence in context: A014690 A274383 A310704 * A310705 A310706 A095875
KEYWORD
nonn,word
AUTHOR
Jonathan R. Love (japanada11(AT)yahoo.ca), Mar 23 2007
STATUS
approved

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Last modified April 17 13:58 EDT 2024. Contains 371764 sequences. (Running on oeis4.)