n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 30 |
6 | 221 |
7 | 2201 |
8 | 27769 |
9 | 424757 |
10 | 7639190 |
11 | 157969167 |
12 | 3692733181 |
13 | 96293669499 |
14 | 2771232779481 |
15 | 87247362424120 |
16 | 2982901522141490 |
17 | 110057420712635526 |
18 | 4358745145279372293 |
19 | 184433423940319376323 |
[1,1,1,2,6,30,221,2201,27769,424757,7639190, 157969167,3692733181,96293669499,2771232779481, 87247362424120,2982901522141490, 110057420712635526,4358745145279372293, 184433423940319376323] |