n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 46 |
5 | 426 |
6 | 6816 |
7 | 164778 |
8 | 5561666 |
9 | 248740730 |
10 | 14187451940 |
11 | 1002045820690 |
12 | 85615117761142 |
13 | 8682866612715706 |
14 | 1029036311254555560 |
15 | 140656568448867136650 |
16 | 21929110364021381812410 |
17 | 3862525357012048643891882 |
18 | 762298016068721625860646524 |
[1,2,4,10,46,426,6816,164778,5561666,248740730, 14187451940,1002045820690,85615117761142, 8682866612715706,1029036311254555560, 140656568448867136650,21929110364021381812410, 3862525357012048643891882, 762298016068721625860646524] |