id:A083321 - OEIS Search Results

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

+0
2

1, 0, -4, 18, -64, 210, -664, 2058, -6304, 19170, -58024, 175098, -527344, 1586130, -4766584, 14316138, -42981184, 129009090, -387158344, 1161737178, -3485735824, 10458256050, -31376865304, 94134790218, -282412759264, 847255055010, -2541798719464, 7625463267258 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=(-1)^n+(-2)^n-(-3)^n G.f. (1+6x+7x^2)/((1+x)(1+2x)(1+3x)) E.g.f. exp(-x)+exp(-2x)-exp(-3x)`
	MATHEMATICA	`a[n_]:=3^n-2^n-1^n; [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 05 2008]`
	CROSSREFS	`Sequence in context: A057414 A165910 A100177 this_sequence A022728 A115112 A005367` `Adjacent sequences: A083318 A083319 A083320 this_sequence A083322 A083323 A083324`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 25 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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