n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 2 |
6 | 6 |
7 | 46 |
8 | 354 |
9 | 3106 |
10 | 29926 |
11 | 315862 |
12 | 3628906 |
13 | 45132474 |
14 | 604534846 |
15 | 8680957902 |
16 | 133082437730 |
17 | 2169964347282 |
18 | 37505486702678 |
19 | 685046187718022 |
20 | 13186335387855770 |
21 | 266816610979894058 |
22 | 5662225862272325550 |
[1,0,0,0,2,6,46,354,3106,29926,315862,3628906, 45132474,604534846,8680957902,133082437730, 2169964347282,37505486702678,685046187718022, 13186335387855770,266816610979894058, 5662225862272325550] |