|
| |
|
|
A007946
|
|
6*(2*n+1)! / ((n!)^2*(n+3)).
|
|
3
|
|
|
|
2, 9, 36, 140, 540, 2079, 8008, 30888, 119340, 461890, 1790712, 6953544, 27041560, 105306075, 410605200, 1602881040, 6263890380, 24502865310, 95937144600, 375945078600, 1474358525640, 5786272150230, 22724268808176
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
| |
| |
|
|
