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A081896
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A sequence related to C(n+3,3).
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1
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1, 7, 43, 245, 1328, 6944, 35328, 175872, 860160, 4145152, 19726336, 92864512, 433061888, 2002780160, 9193914368, 41926262784, 190052302848, 856845975552, 3843995729920, 17166984282112, 76347338653696, 338237264494592
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OFFSET
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0,2
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COMMENTS
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Binomial transform of A081895. 3rd binomial transform of C(n+3,3), A000292 4th binomial transform of (1,3,3,1,0,0,0,0,....)
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LINKS
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Table of n, a(n) for n=0..21.
Index to sequences with linear recurrences with constant coefficients, signature (16,-96,256,-256)
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FORMULA
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a(n)=4^n(n^3+33n^2+254n+384)/384 G.f.: (1-3x)^3/(1-4x)^4
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CROSSREFS
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Cf. A081897.
Sequence in context: A027176 A079925 A126718 * A193656 A125344 A163869
Adjacent sequences: A081893 A081894 A081895 * A081897 A081898 A081899
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry, Mar 30 2003
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STATUS
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approved
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