A165229 - OEIS

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A165229

a(0)=1, a(1)=6, a(n)=12*a(n-1)-6*a(n-2) for n>1 .

1, 6, 66, 756, 8676, 99576, 1142856, 13116816, 150544656, 1727834976, 19830751776 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1-6x)/(1-12x+6x^2) .` `a(n)=(1/2)*{[6+sqrt(30)]^n+[6-sqrt(30)]^n , with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Sep 16 2009]`
	CROSSREFS	`Sequence in context: A022024 A186666 A129554 * A127857 A127858 A173535` `Adjacent sequences: A165226 A165227 A165228 * A165230 A165231 A165232`
	KEYWORD	`nonn`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Sep 09 2009`

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.