n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 17 |
4 | 57 |
5 | 189 |
6 | 625 |
7 | 2065 |
8 | 6821 |
9 | 22529 |
10 | 74409 |
11 | 245757 |
12 | 811681 |
13 | 2680801 |
14 | 8854085 |
15 | 29243057 |
16 | 96583257 |
17 | 318992829 |
18 | 1053561745 |
19 | 3479678065 |
20 | 11492595941 |
21 | 37957465889 |
22 | 125364993609 |
23 | 414052446717 |
24 | 1367522333761 |
25 | 4516619448001 |
26 | 14917380677765 |
27 | 49268761481297 |
[1,1,5,17,57,189,625,2065,6821,22529,74409,245757, 811681,2680801,8854085,29243057,96583257, 318992829,1053561745,3479678065,11492595941, 37957465889,125364993609,414052446717, 1367522333761,4516619448001,14917380677765, 49268761481297] |