n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 50 |
4 | 484 |
5 | 5105 |
6 | 56928 |
7 | 660112 |
8 | 7878940 |
9 | 96159476 |
10 | 1194532794 |
11 | 15053992178 |
12 | 191993403476 |
13 | 2473358617150 |
14 | 32137897641232 |
15 | 420698195672700 |
16 | 5542894551818268 |
17 | 73447821835338348 |
18 | 978178443083177880 |
19 | 13086377223959022952 |
20 | 175785879063917657688 |
[1,1,6,50,484,5105,56928,660112,7878940,96159476, 1194532794,15053992178,191993403476,2473358617150, 32137897641232,420698195672700,5542894551818268, 73447821835338348,978178443083177880, 13086377223959022952,175785879063917657688] |