n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 150 |
6 | 962 |
7 | 6846 |
8 | 54266 |
9 | 471750 |
10 | 4439762 |
11 | 44911086 |
12 | 485570186 |
13 | 5581383990 |
14 | 67890295202 |
15 | 870493380126 |
16 | 11726471352986 |
17 | 165475293394470 |
18 | 2439632685738482 |
19 | 37491028556508366 |
20 | 599285435979866666 |
21 | 9945441791592272790 |
22 | 171062503783616702402 |
[1,0,2,6,26,150,962,6846,54266,471750,4439762, 44911086,485570186,5581383990,67890295202, 870493380126,11726471352986,165475293394470, 2439632685738482,37491028556508366, 599285435979866666,9945441791592272790, 171062503783616702402] |