id:A140683 - OEIS Search Results

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3*(-1)^(n+1)*2^n-1.

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-4, 5, -13, 23, -49, 95, -193, 383, -769, 1535, -3073, 6143, -12289, 24575, -49153, 98303, -196609, 393215, -786433, 1572863, -3145729, 6291455, -12582913, 25165823, -50331649, 100663295, -201326593, 402653183, -805306369, 1610612735, -3221225473 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`Alternated reading of negative of A140660 and A140529.` `The binomial transform yields -4 followed by the negative of A140657.` `The inverse binomial transform yields essentially a signed version of A000244. - R. J. Mathar, Aug 02 2008.`
	FORMULA	`a(2n)= -A140660(n). a(2n+1)= A140529(n).` `a(n+1)-a(n)= (-1)^nA005010(n). a(2n)+a(2n+1)= A096045(n).` `a(n) = A140590(n+1)-2A140590(n).` `O.g.f: (4-x)/((x-1)(2x+1)). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 02 2008`
	CROSSREFS	`Sequence in context: A094029 A005672 A147001 this_sequence A071341 A102981 A029663` `Adjacent sequences: A140680 A140681 A140682 this_sequence A140684 A140685 A140686`
	KEYWORD	`sign`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Jul 11 2008`
	EXTENSIONS	`Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 02 2008`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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