n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 53 |
4 | 554 |
5 | 6362 |
6 | 77580 |
7 | 986253 |
8 | 12927170 |
9 | 173452334 |
10 | 2370742868 |
11 | 32892031042 |
12 | 462030186916 |
13 | 6557906929108 |
14 | 93909078262808 |
15 | 1355087936016957 |
16 | 19684187540818866 |
17 | 287612514032460070 |
18 | 4224238030616082948 |
19 | 62329883931236020470 |
20 | 923519220367120779820 |
[1,1,6,53,554,6362,77580,986253,12927170, 173452334,2370742868,32892031042,462030186916, 6557906929108,93909078262808,1355087936016957, 19684187540818866,287612514032460070, 4224238030616082948,62329883931236020470, 923519220367120779820] |