A151758 - OEIS

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A151758

G.f.: Theta^2-Theta, where Theta = Sum_{k>=0} x^(2^k).

0, -1, 0, 2, 0, 2, 2, 0, 0, 2, 2, 0, 2, 0, 0, 0, 0, 2, 2, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	COMMENTS	`If we omit the "-x" term and divide by 2, we get the characteristic function of the numbers with binary weight 2 (A018900, A151774).`
	CROSSREFS	`Cf. A000079, A073267, A151759, A151760, A151761, A151762, A018900, A151774.` `Sequence in context: A174610 A028928 A091379 * A164272 A164273 A106277` `Adjacent sequences: A151755 A151756 A151757 * A151759 A151760 A151761`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jun 22 2009`

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Last modified February 17 18:57 EST 2012. Contains 206074 sequences.