A092897 - OEIS

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A092897

Expansion of (1-x-x^2-3x^3)/((1+x)^2(1-3x)).

1, 0, 4, 4, 24, 56, 188, 540, 1648, 4912, 14772, 44276, 132872, 398568, 1195756, 3587212, 10761696, 32285024, 96855140, 290565348, 871696120, 2615088280, 7845264924, 23535794684, 70607384144, 211822152336, 635466457108 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,3`
	COMMENTS	`Binomial transform is A092896.`
	LINKS	`Table of n, a(n) for n=0..26.`
	FORMULA	`a(n)=3^n/4+0^n-(-1)^n/4+n(-1)^n.`
	CROSSREFS	`Sequence in context: A131978 A049614 A058166 * A171633 A221276 A117429` `Adjacent sequences: A092894 A092895 A092896 * A092898 A092899 A092900`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry, Mar 12 2004`
	STATUS	`approved`

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Last modified May 21 02:50 EDT 2013. Contains 225474 sequences.