A067278 a(n) = letters(n) + a(n-1); a(0) = 0.

0, 3, 6, 11, 15, 19, 22, 27, 32, 36, 39, 45, 51, 59, 67, 74, 81, 90, 98, 106, 112, 121, 130, 141, 151, 161, 170, 181, 192, 202, 208, 217, 226, 237, 247, 257, 266, 277, 288, 298, 303, 311, 319, 329, 338, 347, 355, 365, 375, 384, 389, 397, 405, 415, 424, 433, 441

Offset

0,2

Links

Table of n, a(n) for n=0..56.

Formula

a(n) = A005589(n) + a(n-1). - Michael S. Branicky, Mar 03 2025

Example

0 + one = 3, 3 + two = 6, 6 + three = 11, 11 + four = 15, 15 + five = 19, ....

Mathematica

nxt[{n_, a_}]:={n+1, a+StringLength[StringDelete[IntegerName[n+1, "English"], Except[LetterCharacter]]]}; NestList[nxt, {0, 0}, 60][[;; , 2]] (* Harvey P. Dale, Dec 24 2025 *)

Crossrefs

Cf. A005589, A052360, A052362, A052363.

Sequence in context: A229035 A187896 A225521 * A310100 A234011 A368384

Adjacent sequences: A067275 A067276 A067277 * A067279 A067280 A067281

Keyword

easy,nonn,word

Author

Scott A. Brown, Feb 22 2002

Status

approved