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A092897 Expansion of (1-x-x^2-3x^3)/((1+x)^2(1-3x)). 1
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 October 24 22:48 EDT 2014. Contains 248516 sequences.