id:A038810 - OEIS Search Results

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a(n) is the number of ways to write the number n as dk...di...d2d1d0 where digit di represents di * (di+1)^i, restricting di to 0..9.

+0
1

1, 1, 2, 2, 3, 3, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 9, 9, 11, 11, 13, 13, 13, 13, 15, 15, 16, 16, 17, 17, 17, 17, 19, 19, 19, 19, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 24, 24, 25, 25, 27, 27, 26, 26, 30, 30, 32, 32, 33, 33, 36, 36, 39, 39, 39, 39, 38, 38, 39, 39, 39, 39, 42, 42, 44 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`a(7)=5 since 7 = (78^0) = (12^1)+(56^0) = (23^1)+(12^0) = (12^2)+(01^1)+(34^0) = (12^2)+(12^1)+(1*2^0), which are the numbers {7,15,21,103,111}.`
	CROSSREFS	`Adjacent sequences: A038807 A038808 A038809 this_sequence A038811 A038812 A038813` `Sequence in context: A108221 A082524 A099961 this_sequence A086609 A035031 A035032`
	KEYWORD	`nonn`
	AUTHOR	`Naohiro Nomoto (6284968128(AT)geocities.co.jp)`
	EXTENSIONS	`More terms and additional comments from Larry Reeves (larryr(AT)acm.org), Mar 16 2001.`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.

AT&T Labs Research