n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 55 |
7 | 270 |
8 | 1893 |
9 | 14864 |
10 | 133749 |
11 | 1334970 |
12 | 14687195 |
13 | 176214852 |
14 | 2290820923 |
15 | 32071104006 |
16 | 481066907653 |
17 | 7697064251760 |
18 | 130850098582189 |
19 | 2355301661033970 |
20 | 44750731672347273 |
21 | 895014631193654828 |
22 | 18795307257304746591 |
23 | 413496759611120779902 |
24 | 9510425471105377569963 |
25 | 228250211305338670543432 |
[0,0,1,2,5,12,55,270,1893,14864,133749,1334970, 14687195,176214852,2290820923,32071104006, 481066907653,7697064251760,130850098582189, 2355301661033970,44750731672347273, 895014631193654828,18795307257304746591, 413496759611120779902,9510425471105377569963, 228250211305338670543432] |