n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 32 |
5 | 140 |
6 | 1512 |
7 | 6384 |
8 | 44928 |
9 | 749088 |
10 | 4299840 |
11 | 42546240 |
12 | 974695680 |
13 | 7061783040 |
14 | 90598072320 |
15 | 2640888230400 |
16 | 23099489280000 |
17 | 364696083763200 |
18 | 12881138586624000 |
19 | 132004210918809600 |
20 | 2475855534329856000 |
21 | 102587486964092928000 |
22 | 1205260977814806528000 |
[1,1,2,12,32,140,1512,6384,44928,749088,4299840, 42546240,974695680,7061783040,90598072320, 2640888230400,23099489280000,364696083763200, 12881138586624000,132004210918809600, 2475855534329856000,102587486964092928000, 1205260977814806528000] |