n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 58 |
6 | 332 |
7 | 2232 |
8 | 17225 |
9 | 150103 |
10 | 1458149 |
11 | 15623031 |
12 | 183012659 |
13 | 2326875239 |
14 | 31911431853 |
15 | 469553925838 |
16 | 7378704548888 |
17 | 123329776031414 |
18 | 2184698889699346 |
19 | 40885079221516335 |
20 | 806020133224179176 |
[1,0,1,3,12,58,332,2232,17225,150103,1458149, 15623031,183012659,2326875239,31911431853, 469553925838,7378704548888,123329776031414, 2184698889699346,40885079221516335, 806020133224179176] |