id:A113142 - OEIS Search Results

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

+0
2

0, 1, -5, 10, -14, 18, -22, 26, -30, 34, -38, 42, -46, 50, -54, 58, -62, 66, -70, 74, -78, 82, -86, 90, -94, 98, -102, 106, -110, 114, -118, 122, -126, 130, -134, 138, -142, 146, -150, 154, -158, 162, -166, 170, -174, 178, -182, 186 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Second column in number triangle A113141.`
	FORMULA	`a(n)=-(-1)^n(4n-2-C(1, n-1)+2C(0, n)).`
	CROSSREFS	`Sequence in context: A154315 A023981 A166037 this_sequence A001958 A105136 A023494` `Adjacent sequences: A113139 A113140 A113141 this_sequence A113143 A113144 A113145`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 15 2005`

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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.

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