n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 8 |
4 | 26 |
5 | 70 |
6 | 820 |
7 | 5152 |
8 | 20316 |
9 | 388712 |
10 | 3666188 |
11 | 17298908 |
12 | 501805832 |
13 | 6256792412 |
14 | 33844737292 |
15 | 1353617016078 |
16 | 20960708128068 |
17 | 137741948419428 |
18 | 6588092586831028 |
19 | 121860622573650906 |
20 | 924837580461274556 |
[1,1,2,8,26,70,820,5152,20316,388712,3666188, 17298908,501805832,6256792412,33844737292, 1353617016078,20960708128068,137741948419428, 6588092586831028,121860622573650906, 924837580461274556] |