n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 55 |
4 | 315 |
5 | 2243 |
6 | 19378 |
7 | 198363 |
8 | 2358860 |
9 | 32060736 |
10 | 491393909 |
11 | 8398281337 |
12 | 158541018923 |
13 | 3279307650137 |
14 | 73808041476439 |
15 | 1796794875356409 |
16 | 47063878147374980 |
17 | 1320276655048586177 |
18 | 39504980013582635300 |
19 | 1256210676237601811305 |
20 | 42313074100060933324771 |
[1,3,12,55,315,2243,19378,198363,2358860,32060736, 491393909,8398281337,158541018923,3279307650137, 73808041476439,1796794875356409,47063878147374980, 1320276655048586177,39504980013582635300, 1256210676237601811305,42313074100060933324771] |