n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 440 |
6 | 38368 |
7 | 1022320 |
8 | 14082528 |
9 | 126490352 |
10 | 837543200 |
11 | 4412818240 |
12 | 19447224864 |
13 | 74255991784 |
14 | 251997948736 |
15 | 774861621936 |
16 | 2191005028672 |
17 | 5764306674400 |
18 | 14243327787456 |
19 | 33309659739904 |
20 | 74194554880960 |
21 | 158241369977880 |
22 | 324605935279648 |
23 | 642894402918768 |
[0,0,0,0,440,38368,1022320,14082528,126490352, 837543200,4412818240,19447224864,74255991784, 251997948736,774861621936,2191005028672, 5764306674400,14243327787456,33309659739904, 74194554880960,158241369977880,324605935279648, 642894402918768] |