|
| |
|
|
A104474
|
|
C(n+3,3)*C(n+7,3).
|
|
0
| |
|
|
35, 224, 840, 2400, 5775, 12320, 24024, 43680, 75075, 123200, 194480, 297024, 440895, 638400, 904400, 1256640, 1716099, 2307360, 3059000, 4004000, 5180175, 6630624, 8404200, 10556000, 13147875, 16248960, 19936224, 24295040, 29419775
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
FORMULA
| a(n) = (1/36)*(n+1)*(n+2)*(n+3)*(n+5)*(n+6)*(n+7).
|
|
|
EXAMPLE
| a(0) : if n=0 then C(0+3,3)*C(0+7,3)=C(3,3)*C(7,3)=1*35=35
a(7) : if n=7 then C(7+3,3)*C(7+7,3)=C(10,3)*(14,3)=120*364=43680
|
|
|
MATHEMATICA
| f[n_] := Binomial[n + 3, 3]Binomial[n + 7, 3]; Table[ f[n], {n, 0, 28}] (from Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 20 2005)
|
|
|
CROSSREFS
| Sequence in context: A064013 A020262 A195968 * A171471 A068722 A113941
Adjacent sequences: A104471 A104472 A104473 * A104475 A104476 A104477
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Zerinvary Lajos (zlaja(AT)freemail.hu), Apr 18 2005
|
|
|
EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 20 2005
|
| |
|
|
