n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 48 |
4 | 360 |
5 | 3088 |
6 | 28928 |
7 | 288208 |
8 | 3003952 |
9 | 32402384 |
10 | 359019952 |
11 | 4064452272 |
12 | 46829600704 |
13 | 547498996736 |
14 | 6480275672192 |
15 | 77511461858592 |
16 | 935562094075392 |
17 | 11381614588917296 |
18 | 139425068741674448 |
19 | 1718444636265140992 |
20 | 21295889048851102176 |
21 | 265200380258393530896 |
[1,2,8,48,360,3088,28928,288208,3003952,32402384, 359019952,4064452272,46829600704,547498996736, 6480275672192,77511461858592,935562094075392, 11381614588917296,139425068741674448, 1718444636265140992,21295889048851102176, 265200380258393530896] |