n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 11 |
4 | 53 |
5 | 309 |
6 | 2119 |
7 | 16687 |
8 | 148329 |
9 | 1468457 |
10 | 16019531 |
11 | 190899411 |
12 | 2467007773 |
13 | 34361893981 |
14 | 513137616783 |
15 | 8178130767479 |
16 | 138547156531409 |
17 | 2486151753313617 |
18 | 47106033220679059 |
19 | 939765362752547227 |
20 | 19690321886243846661 |
21 | 432292066866171724421 |
[1,1,3,11,53,309,2119,16687,148329,1468457, 16019531,190899411,2467007773,34361893981, 513137616783,8178130767479,138547156531409, 2486151753313617,47106033220679059, 939765362752547227,19690321886243846661, 432292066866171724421] |