n | a(n) |
---|---|
2 | 0 |
3 | 0 |
4 | 0 |
5 | 12 |
6 | 72 |
7 | 612 |
8 | 3552 |
9 | 34632 |
10 | 247824 |
11 | 3047544 |
12 | 26502624 |
13 | 396071604 |
14 | 4055072664 |
15 | 71316639036 |
16 | 839706878016 |
17 | 16982482829136 |
18 | 225984627860256 |
19 | 5165674068939696 |
20 | 76644407669629248 |
21 | 1953726395279874588 |
22 | 31974794507569558248 |
23 | 899186672783502993108 |
24 | 16089847137602083031328 |
[0,0,0,12,72,612,3552,34632,247824,3047544, 26502624,396071604,4055072664,71316639036, 839706878016,16982482829136,225984627860256, 5165674068939696,76644407669629248, 1953726395279874588,31974794507569558248, 899186672783502993108,16089847137602083031328] |