id:A091097 - OEIS Search Results

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Expansion of (1+6x-60x^2)/((1-6x)(1+6x)).

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1, 6, -24, 216, -864, 7776, -31104, 279936, -1119744, 10077696, -40310784, 362797056, -1451188224, 13060694016, -52242776064, 470184984576, -1880739938304, 16926659444736, -67706637778944, 609359740010496, -2437438960041984 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`a(0)=1, a(2n-1)=k^(2n-1), a(2n)=(2-k)k^(2n-1), k=6, G.f.: (1+kx+(2-2k)kx^2)/((1-kx)(1+kx)), k=6.`
	FORMULA	`a(n)=6^n/6+(-5)(-6)^n/6+10*0^n/6`
	CROSSREFS	`Sequence in context: A064049 A018981 A052594 this_sequence A112675 A052583 A052671` `Adjacent sequences: A091094 A091095 A091096 this_sequence A091098 A091099 A091100`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Dec 19 2003`

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Last modified December 3 16:57 EST 2008. Contains 151279 sequences.

AT&T Labs Research