A107904 - OEIS

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A107904

Expansion of (1+6x)/(1-12x^2).

1, 6, 12, 72, 144, 864, 1728, 10368, 20736, 124416, 248832, 1492992, 2985984, 17915904, 35831808, 214990848, 429981696, 2579890176, 5159780352, 30958682112, 61917364224, 371504185344, 743008370688, 4458050224128 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	COMMENTS	`Fourth binomial transform is A107903.`
	LINKS	`Table of n, a(n) for n=0..23.` `Index entries for sequences related to linear recurrences with constant coefficients, signature 0,12.`
	FORMULA	`a(n)=((1+sqrt(3))(2sqrt(3))^n+(1-sqrt(3))(-2sqrt(3))^n)/2.` `a(2n) = 12^n, a(2n+1) = 6*12^n.`
	CROSSREFS	`Cf. A094015.` `Sequence in context: A045780 A088726 A163342 * A071930 A061520 A220232` `Adjacent sequences: A107901 A107902 A107903 * A107905 A107906 A107907`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry, May 27 2005`
	STATUS	`approved`

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Last modified May 20 01:31 EDT 2013. Contains 225445 sequences.