id:A081729 - OEIS Search Results

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Expansion of Sum(k>=0, x^(2^k)) + 1/(1+x). First differences of A007456 (gossip sequence) for n>1.

+0
3

1, 0, 2, -1, 2, -1, 1, -1, 2, -1, 1, -1, 1, -1, 1, -1, 2, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 2, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 2, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`For n>1: a(n)=2, if n is power of 2; a(n)=-1, if n odd; a(n)=1 otherwise.` `Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), May 24 2009: (Start)` `The absolute values of a(n) for n>=2 equal the q(n) sequence of the Eta triangle A160464.` `(End)`
	CROSSREFS	`Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), May 24 2009: (Start)` `Cf. A160464 and A043529.` `(End)` `Sequence in context: A030338 A159847 A106345 this_sequence A080215 A060500 A160198` `Adjacent sequences: A081726 A081727 A081728 this_sequence A081730 A081731 A081732`
	KEYWORD	`sign,easy`
	AUTHOR	`Ralf Stephan (ralf(AT)ark.in-berlin.de), Apr 06 2003`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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