id:A077953 - OEIS Search Results

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Expansion of 1/(1-x+2*x^2-2*x^3).

+0
5

1, 1, -1, -1, 3, 3, -5, -5, 11, 11, -21, -21, 43, 43, -85, -85, 171, 171, -341, -341, 683, 683, -1365, -1365, 2731, 2731, -5461, -5461, 10923, 10923, -21845, -21845, 43691, 43691, -87381, -87381, 174763, 174763, -349525, -349525, 699051, 699051, -1398101, -1398101, 2796203, 2796203, -5592405 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Essentially the same as A077980.` `a(n) = A077925(floor(n/2)-1) for n>1. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 07 2008]`
	FORMULA	`a(n+1) = a(n) - 2a(n-1) + 2a(n-2). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 07 2008]`
	CROSSREFS	`A007420. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 07 2008]` `Sequence in context: A124115 A124114 A077893 this_sequence A077980 A146245 A161220` `Adjacent sequences: A077950 A077951 A077952 this_sequence A077954 A077955 A077956`
	KEYWORD	`sign`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Nov 17 2002, Jun 17 2007`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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