n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 7 |
6 | 33 |
7 | 244 |
8 | 2792 |
9 | 52448 |
10 | 1690206 |
11 | 96288815 |
12 | 9873721048 |
13 | 1841360945834 |
14 | 629414405238720 |
15 | 397024508142598996 |
16 | 464923623652122023478 |
17 | 1016016289424631486429082 |
18 | 4162473006943138723685574978 |
19 | 32096861904411547975392065322659 |
[0,0,1,2,7,33,244,2792,52448,1690206,96288815, 9873721048,1841360945834,629414405238720, 397024508142598996,464923623652122023478, 1016016289424631486429082, 4162473006943138723685574978, 32096861904411547975392065322659] |