n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 26 |
4 | 240 |
5 | 3124 |
6 | 45864 |
7 | 823542 |
8 | 16711680 |
9 | 387400806 |
10 | 9990233352 |
11 | 285311670610 |
12 | 8913906892800 |
13 | 302875106592252 |
14 | 11111328602468784 |
15 | 437893859848932344 |
16 | 18446462598732840960 |
17 | 827240261886336764176 |
18 | 39346257879101671328376 |
19 | 1978419655660313589123978 |
[1,3,26,240,3124,45864,823542,16711680,387400806, 9990233352,285311670610,8913906892800, 302875106592252,11111328602468784, 437893859848932344,18446462598732840960, 827240261886336764176,39346257879101671328376, 1978419655660313589123978] |