n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 7 |
6 | 24 |
7 | 93 |
8 | 434 |
9 | 2110 |
10 | 10957 |
11 | 58713 |
12 | 321576 |
13 | 1792133 |
14 | 10131027 |
15 | 57949430 |
16 | 334970205 |
17 | 1953890318 |
18 | 11489753730 |
19 | 68054102361 |
20 | 405715557048 |
[1,1,1,3,7,24,93,434,2110,10957,58713,321576, 1792133,10131027,57949430,334970205,1953890318, 11489753730,68054102361,405715557048] |