n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 2 |
3 | 10 |
4 | 66 |
5 | 538 |
6 | 5170 |
7 | 56906 |
8 | 704226 |
9 | 9671930 |
10 | 145992338 |
11 | 2403271594 |
12 | 42869336130 |
13 | 824103252058 |
14 | 16991417367538 |
15 | 374154425946890 |
16 | 8765990409737634 |
17 | 217771226025864122 |
18 | 5718895163944768850 |
19 | 158315176568802482794 |
20 | 4608155971186431515394 |
[1,2,2,10,66,538,5170,56906,704226,9671930, 145992338,2403271594,42869336130,824103252058, 16991417367538,374154425946890,8765990409737634, 217771226025864122,5718895163944768850, 158315176568802482794,4608155971186431515394] |