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A067278
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a(n) = letters(n) + a(n-1); a(0) = 0
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1
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| 0 + one = 3, 3 + two = 6, 6 + three = 11, 11 + four = 15, 15 + five = 19, .....
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CROSSREFS
| Cf. A005589, A052360, A052362, A052363.
Sequence in context: A049620 A056232 A187896 * A113960 A152682 A059753
Adjacent sequences: A067275 A067276 A067277 * A067279 A067280 A067281
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KEYWORD
| easy,nonn,word
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AUTHOR
| Scott A. Brown (scottbrown(AT)neo.rr.com), Feb 22 2002
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