n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 6 |
4 | 17 |
5 | 59 |
6 | 204 |
7 | 750 |
8 | 2746 |
9 | 10215 |
10 | 37936 |
11 | 141468 |
12 | 527283 |
13 | 1967449 |
14 | 7340090 |
15 | 27392124 |
16 | 102219380 |
17 | 381482477 |
18 | 1423676862 |
19 | 5313214098 |
20 | 19829053909 |
21 | 74002960983 |
22 | 276182321224 |
23 | 1030726172586 |
24 | 3846720619566 |
25 | 14356155740947 |
26 | 53577895814828 |
27 | 199955425410792 |
[1,1,6,17,59,204,750,2746,10215,37936,141468, 527283,1967449,7340090,27392124,102219380, 381482477,1423676862,5313214098,19829053909, 74002960983,276182321224,1030726172586, 3846720619566,14356155740947,53577895814828, 199955425410792] |