n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 9 |
5 | 46 |
6 | 262 |
7 | 1588 |
8 | 10053 |
9 | 65686 |
10 | 439658 |
11 | 2999116 |
12 | 20774154 |
13 | 145726348 |
14 | 1033125004 |
15 | 7390626280 |
16 | 53281906861 |
17 | 386732675046 |
18 | 2823690230850 |
19 | 20725376703324 |
20 | 152833785130398 |
21 | 1131770853856100 |
22 | 8412813651862868 |
[0,0,1,2,9,46,262,1588,10053,65686,439658,2999116, 20774154,145726348,1033125004,7390626280, 53281906861,386732675046,2823690230850, 20725376703324,152833785130398,1131770853856100, 8412813651862868] |