n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 6 |
4 | 37 |
5 | 240 |
6 | 1693 |
7 | 13446 |
8 | 122329 |
9 | 1261104 |
10 | 14332681 |
11 | 175123446 |
12 | 2267871517 |
13 | 30981705984 |
14 | 446571784261 |
15 | 6798161166486 |
16 | 109220619908593 |
17 | 1846729159654560 |
18 | 32726973173941585 |
19 | 605358657750562470 |
20 | 11648701234354836565 |
21 | 232655173657593759312 |
[1,0,1,6,37,240,1693,13446,122329,1261104, 14332681,175123446,2267871517,30981705984, 446571784261,6798161166486,109220619908593, 1846729159654560,32726973173941585, 605358657750562470,11648701234354836565, 232655173657593759312] |