n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 15 |
7 | 455 |
8 | 20230 |
9 | 1166886 |
10 | 82031250 |
11 | 6768679170 |
12 | 639276644655 |
13 | 67876292150095 |
14 | 7992910154350121 |
15 | 1032869077119140625 |
16 | 145221924661653841820 |
17 | 22060305511905816000860 |
18 | 3599313659344525384083060 |
19 | 627583654087024080928783956 |
[0,0,0,1,1,15,455,20230,1166886,82031250, 6768679170,639276644655,67876292150095, 7992910154350121,1032869077119140625, 145221924661653841820,22060305511905816000860, 3599313659344525384083060, 627583654087024080928783956] |