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 A070280 a(1) = 1; a(n) = a(n-1) + product of the digits of n-1. 0
 1, 2, 4, 7, 11, 16, 22, 29, 37, 46, 46, 47, 49, 52, 56, 61, 67, 74, 82, 91, 91, 93, 97, 103, 111, 121, 133, 147, 163, 181, 181, 184, 190, 199, 211, 226, 244, 265, 289, 316, 320, 328, 340, 356, 376, 400, 428, 460, 496, 496, 501, 511, 526, 546, 571, 601, 636, 676 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS EXAMPLE a(12) = a(11) + product of digits of 11 = 46 + 1 = 47. MATHEMATICA a[n_] := a[n] = (a[n - 1] + Times @@ IntegerDigits[n - 1]); a[1] = 1; Table[ a[n], {n, 1, 60}] CROSSREFS Sequence in context: A025702 A025717 A025726 * A025707 A025733 A025716 Adjacent sequences:  A070277 A070278 A070279 * A070281 A070282 A070283 KEYWORD base,nonn AUTHOR Joseph L. Pe, May 09 2002 EXTENSIONS Edited by Robert G. Wilson v, May 14 2002 STATUS approved

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Last modified December 14 01:33 EST 2019. Contains 329978 sequences. (Running on oeis4.)