A126891 Number of letters in the English name of n, excluding spaces and hyphens and all integers preceding it.

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

Offset

1,1

Comments

Partial sums of A005589(n).

Links

Table of n, a(n) for n=1..56.

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

Adjacent sequences: A126888 A126889 A126890 * A126892 A126893 A126894

Keyword

nonn,word

Author

Jonathan R. Love (japanada11(AT)yahoo.ca), Mar 23 2007

Status

approved