n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 9 |
4 | 36 |
5 | 210 |
6 | 1296 |
7 | 7056 |
8 | 40824 |
9 | 262440 |
10 | 1700352 |
11 | 10478160 |
12 | 62355744 |
13 | 367960320 |
14 | 2176782336 |
15 | 12958657344 |
16 | 77716392192 |
17 | 468205557120 |
18 | 2821109907456 |
19 | 16960580969472 |
20 | 101758315958784 |
21 | 609954817881600 |
22 | 3656220357427200 |
23 | 21926486787222528 |
24 | 131557435432187904 |
[0,1,9,36,210,1296,7056,40824,262440,1700352, 10478160,62355744,367960320,2176782336, 12958657344,77716392192,468205557120, 2821109907456,16960580969472,101758315958784, 609954817881600,3656220357427200, 21926486787222528,131557435432187904] |