n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 4 |
6 | 36 |
7 | 225 |
8 | 7840 |
9 | 313600 |
10 | 45302400 |
11 | 8930250000 |
12 | 8373836401920 |
13 | 9001015156742400 |
14 | 41813367543204433176 |
15 | 325385777102562972821025 |
16 | 8270190445766978650521600000 |
17 | 377177413291384771899817984000000 |
18 | 62187743659065606074696974956949929984 |
[1,1,1,2,4,36,225,7840,313600,45302400,8930250000, 8373836401920,9001015156742400, 41813367543204433176,325385777102562972821025, 8270190445766978650521600000, 377177413291384771899817984000000, 62187743659065606074696974956949929984] |