id:A166035 - OEIS Search Results

Search: id:A166035

Displaying 1-1 of 1 results found.

page 1

a(n)= (3^n+6*(-4)^n)/7.

+0
7

1, -3, 15, -51, 231, -841, 3615, -13731, 57111, -221883, 907215, -3569811, 14456391, -57294123, 230770815, -918300291, 3687550071, -14707153563, 58957754415, -235443597171, 942936650151, -3768259816203, 15083499618015 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(0)= 1, a(1)= -3, a(n)= 12a(n-2)-a(n-1) for n>1. a(n)= Sum_{k, 0<=k<=n} A112555(n,k)(-4)^k. G.f.: (1-2x)/(1+x-12x^2).`
	CROSSREFS	`Cf. A077925, A091004` `Sequence in context: A043005 A165746 A118126 this_sequence A038192 A147618 A085480` `Adjacent sequences: A166032 A166033 A166034 this_sequence A166036 A166037 A166038`
	KEYWORD	`easy,sign`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 05 2009`

page 1

Search completed in 0.006 seconds

Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research