id:A094115 - OEIS Search Results

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Partial sums of A093347.

+0
1

0, 1, 1, 4, 6, 9, 9, 10, 10, 19, 27, 36, 42, 49, 55, 64, 72, 81, 81, 82, 82, 85, 87, 90, 90, 91, 91, 118, 144, 171, 195, 220, 244, 271, 297, 324, 342, 361, 379, 400, 420, 441, 459, 478, 496, 523, 549, 576, 600, 625, 649, 676, 702, 729, 729, 730, 730, 733, 735, 738, 738 (list; graph; listen)

	OFFSET	`1,4`
	FORMULA	`a(3^k)=(9^k-1)/8`
	PROGRAM	`(PARI) a(n)=sum(k=1, n, -sum(i=1, k-1, (-1)^i*3^valuation(i, 3)))`
	CROSSREFS	`Sequence in context: A085088 A073870 A084335 this_sequence A163297 A051679 A010378` `Adjacent sequences: A094112 A094113 A094114 this_sequence A094116 A094117 A094118`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 03 2004`

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Last modified December 4 08:07 EST 2009. Contains 170310 sequences.

AT&T Labs Research