n | a(n) |
---|---|
1 | 1 |
2 | 40 |
3 | 793 |
4 | 12800 |
5 | 193721 |
6 | 2886520 |
7 | 42999713 |
8 | 642355200 |
9 | 9617422321 |
10 | 144167168200 |
11 | 2162192792233 |
12 | 32433400563200 |
13 | 486521516676521 |
14 | 7298047169453080 |
15 | 109472483776866353 |
16 | 1642098503032012800 |
17 | 24631532723767204321 |
18 | 369473147671033293160 |
19 | 5542096617629211606073 |
20 | 83131435057615545920000 |
[1,40,793,12800,193721,2886520,42999713,642355200, 9617422321,144167168200,2162192792233, 32433400563200,486521516676521,7298047169453080, 109472483776866353,1642098503032012800, 24631532723767204321,369473147671033293160, 5542096617629211606073,83131435057615545920000] |