n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 19 |
6 | 95 |
7 | 291 |
8 | 2037 |
9 | 10203 |
10 | 71429 |
11 | 357240 |
12 | 3929640 |
13 | 19648533 |
14 | 255430929 |
15 | 1788018540 |
16 | 16092167088 |
17 | 144829514049 |
18 | 2462101738833 |
19 | 17234712244012 |
20 | 327459532636228 |
21 | 2947135794083881 |
22 | 38312765323095109 |
23 | 421440418557975839 |
24 | 9693129626833444297 |
25 | 87238166641520673597 |
[1,1,2,6,19,95,291,2037,10203,71429,357240, 3929640,19648533,255430929,1788018540,16092167088, 144829514049,2462101738833,17234712244012, 327459532636228,2947135794083881, 38312765323095109,421440418557975839, 9693129626833444297,87238166641520673597] |