A094114 - OEIS

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A094114

a(n)=-sum(i=1,n-1,(-1)^i*2^valuation(i,3)).

0, 1, 0, 2, 1, 2, 0, 1, 0, 4, 3, 4, 2, 3, 2, 4, 3, 4, 0, 1, 0, 2, 1, 2, 0, 1, 0, 8, 7, 8, 6, 7, 6, 8, 7, 8, 4, 5, 4, 6, 5, 6, 4, 5, 4, 8, 7, 8, 6, 7, 6, 8, 7, 8, 0, 1, 0, 2, 1, 2, 0, 1, 0, 4, 3, 4, 2, 3, 2, 4, 3, 4, 0, 1, 0, 2, 1, 2, 0, 1, 0, 16, 15, 16, 14, 15, 14, 16, 15, 16, 12, 13, 12, 14, 13, 14, 12 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	PROG	`(PARI) a(n)=-sum(i=1, n-1, (-1)^i*2^valuation(i, 3))`
	CROSSREFS	`Cf. A093347.` `Sequence in context: A036578 A077402 A137853 * A104607 A120728 A092149` `Adjacent sequences: A094111 A094112 A094113 * A094115 A094116 A094117`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 03 2004`

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Last modified February 14 08:17 EST 2012. Contains 205607 sequences.