|
| |
|
|
A107872
|
|
Column 1 of triangle A107870; a(n) = C( n*(n+1)/2 + n+2, n).
|
|
2
| |
|
|
1, 4, 21, 165, 1820, 26334, 475020, 10295472, 260932815, 7575968400, 247994680648, 9036996468045, 362827605867363, 15913388077274800, 757000487505568680, 38819452599736372800, 2134712294190092847615
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
