n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 52 |
5 | 375 |
6 | 3246 |
7 | 32781 |
8 | 378344 |
9 | 4912515 |
10 | 70872610 |
11 | 1124723193 |
12 | 19471590876 |
13 | 365190378735 |
14 | 7376016877334 |
15 | 159620144556645 |
16 | 3684531055645648 |
17 | 90366129593683035 |
18 | 2346673806524446218 |
19 | 64325158601880061137 |
20 | 1856031746386568222660 |
21 | 56231443721132068265415 |
[0,1,2,9,52,375,3246,32781,378344,4912515, 70872610,1124723193,19471590876,365190378735, 7376016877334,159620144556645,3684531055645648, 90366129593683035,2346673806524446218, 64325158601880061137,1856031746386568222660, 56231443721132068265415] |