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A081902
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A sequence related to C(n+5,5).
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2
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1, 9, 66, 434, 2661, 15525, 87240, 475920, 2534400, 13227520, 67866624, 343105536, 1712390144, 8449622016, 41273524224, 199782039552, 959119884288, 4570314964992, 21629992173568, 101729521631232, 475697692803072
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Binomial transform of A081901. 3rd binomial transform of C(n+5,5). 4th binomial transform of (1,5,10,10,5,1,0,0,0,.....)
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FORMULA
| a(n)=4^n(n^5+90n^4+2635n^3+29850n^2+121024n+122880)/122880 G.f.: (1-3x)^5/(1-4x)^6
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CROSSREFS
| Cf. A081903.
Sequence in context: A122733 A118465 A051375 * A002695 A003408 A037698
Adjacent sequences: A081899 A081900 A081901 * A081903 A081904 A081905
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KEYWORD
| easy,nonn
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Mar 31 2003
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