id:A051814 - OEIS Search Results

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Number of n-digit numbers with nonzero multiplicative digital root 3.

+0
2

1, 7, 40, 240, 1448, 8630, 53545, 371845, 3267453, 36428242, 442762543, 5217693527, 57321559329, 586532407659, 5666269188709, 52728701479194 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`William Mayne, sci.math, Jun 15 1991`
	FORMULA	`# { i : 10^(n-1) < i < 10^n and A051802(i)=3 }`
	CROSSREFS	`Cf. A051802, A051805, A051823.` `Sequence in context: A026716 A026782 A099459 this_sequence A154968 A121582 A062727` `Adjacent sequences: A051811 A051812 A051813 this_sequence A051815 A051816 A051817`
	KEYWORD	`nonn,base,hard`
	AUTHOR	`Dan Hoey (Hoey(AT)AIC.NRL.Navy.Mil), Dec 09 1999`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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