n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 16 |
4 | 122 |
5 | 690 |
6 | 4098 |
7 | 24301 |
8 | 131984 |
9 | 720033 |
10 | 3945050 |
11 | 21470933 |
12 | 115976303 |
13 | 629975658 |
14 | 3432416744 |
15 | 18721854079 |
16 | 102389248936 |
17 | 560740694837 |
18 | 3070272326544 |
19 | 16802201754590 |
20 | 91916873329401 |
21 | 502611764211182 |
[1,2,16,122,690,4098,24301,131984,720033,3945050, 21470933,115976303,629975658,3432416744, 18721854079,102389248936,560740694837, 3070272326544,16802201754590,91916873329401, 502611764211182] |