id:A113904 - OEIS Search Results

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Starting with 1, each number is the previous number plus the product of the index number and the sum of the digits of the previous number.

+0
1

1, 2, 6, 24, 48, 108, 162, 225, 297, 459, 639, 837, 1053, 1170, 1296, 1566, 1854, 2160, 2322, 2493, 2853, 3231, 3429, 3843, 4275, 4725, 5293, 5679, 6435, 6957, 7767, 8604, 9180, 9774, 10692, 11322, 11646, 12312, 12654, 13356, 14076, 14814, 15570, 16344 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = a(n-1)+(n-1)*s(n-1), where s(n) stands for the sum of the digits of n.`
	EXAMPLE	`a(6) = a(5)+ 5s(a(5)) = 48+5s(48) = 48+5*12 = 108`
	CROSSREFS	`Sequence in context: A090755 A004306 A092485 this_sequence A099144 A104114 A118038` `Adjacent sequences: A113901 A113902 A113903 this_sequence A113905 A113906 A113907`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 20 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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