n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 97 |
7 | 528 |
8 | 7525 |
9 | 81413 |
10 | 2330257 |
11 | 53229494 |
12 | 2883887781 |
13 | 143434131379 |
14 | 14268520503521 |
15 | 1569684574492244 |
16 | 282300076226827269 |
17 | 69232924049740233209 |
18 | 22337274702237239579729 |
19 | 12261557957001826246975754 |
20 | 7069170473480519272781373829 |
[1,1,1,2,5,15,97,528,7525,81413,2330257,53229494, 2883887781,143434131379,14268520503521, 1569684574492244,282300076226827269, 69232924049740233209,22337274702237239579729, 12261557957001826246975754, 7069170473480519272781373829] |