n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 12 |
8 | 137 |
9 | 1602 |
10 | 19710 |
11 | 257400 |
12 | 3574957 |
13 | 52785901 |
14 | 827242933 |
15 | 13730434111 |
16 | 240806565782 |
17 | 4452251786946 |
18 | 86585391630673 |
19 | 1767406549387381 |
20 | 37790452850585180 |
21 | 844817788372455779 |
22 | 19711244788916894489 |
23 | 479203883157602851294 |
[0,0,0,0,0,1,12,137,1602,19710,257400,3574957, 52785901,827242933,13730434111,240806565782, 4452251786946,86585391630673,1767406549387381, 37790452850585180,844817788372455779, 19711244788916894489,479203883157602851294] |