id:A070280 - OEIS Search Results

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a(1) = 1; a(n) = a(n-1) + product of the digits of n-1.

+0
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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; listen)

	OFFSET	`1,2`
	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 this_sequence A025707 A025733 A025716` `Adjacent sequences: A070277 A070278 A070279 this_sequence A070281 A070282 A070283`
	KEYWORD	`base,nonn`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), May 09 2002`
	EXTENSIONS	`Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), May 14 2002`

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

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