A078616 - OEIS

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A078616

Sum(k=0..n, A010815(k)).

1, 0, -1, -1, -1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`To construct the sequence: a(0)=1, a(1)=0, then (21+1) (-1)'s followed by 2 0's, followed by (22+1) 1's, followed by 3 0's, followed by (2*3+1) (-1)'s etc.`
	FORMULA	`For m>0, a(k)=0 if A000326(m) <=k < A000326(m)+m; a(k)=(-1)^m if A000326(m) + m <=k< A000326(m+1)` `G.f.: eta(x)/(1-x) - Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 31 2004`
	PROG	`(PARI) a(n)=polcoeff(eta(x)/(1-x)+O(x^n), n)`
	CROSSREFS	`Sequence in context: A099076 A175479 A120530 * A104106 A141260 A029883` `Adjacent sequences: A078613 A078614 A078615 * A078617 A078618 A078619`
	KEYWORD	`sign`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 10 2002`

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Last modified February 15 14:02 EST 2012. Contains 205811 sequences.