|
Search: id:A081902
|
|
|
| A081902 |
|
A sequence related to C(n+5,5). |
|
+0
3
|
|
| 1, 9, 66, 434, 2661, 15525, 87240, 475920, 2534400, 13227520, 67866624, 343105536, 1712390144, 8449622016, 41273524224, 199782039552, 959119884288, 4570314964992, 21629992173568, 101729521631232, 475697692803072
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
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,.....)
|
|
FORMULA
|
a(n)=4^n(n^5+90n^4+2635n^3+29850n^2+121024n+122880)/122880 G.f.: (1-3x)^5/(1-4x)^6
|
|
CROSSREFS
|
Cf. A081903.
Sequence in context: A122733 A118465 A051375 this_sequence A002695 A003408 A037698
Adjacent sequences: A081899 A081900 A081901 this_sequence A081903 A081904 A081905
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Mar 31 2003
|
|
|
Search completed in 0.002 seconds
|
