n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 15 |
3 | 40 |
4 | 221 |
5 | 702 |
6 | 3355 |
7 | 11780 |
8 | 52041 |
9 | 193402 |
10 | 817895 |
11 | 3138720 |
12 | 12953461 |
13 | 50618102 |
14 | 206059635 |
15 | 813476860 |
16 | 3286192481 |
17 | 13047914802 |
18 | 52482224575 |
19 | 209057202200 |
20 | 838843897101 |
21 | 3347530323502 |
22 | 13413657088715 |
23 | 53584020970740 |
24 | 214547906035321 |
25 | 857556157684202 |
[1,2,15,40,221,702,3355,11780,52041,193402,817895, 3138720,12953461,50618102,206059635,813476860, 3286192481,13047914802,52482224575,209057202200, 838843897101,3347530323502,13413657088715, 53584020970740,214547906035321,857556157684202] |