n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 8 |
4 | 52 |
5 | 294 |
6 | 1691 |
7 | 9736 |
8 | 56277 |
9 | 326430 |
10 | 1899530 |
11 | 11085360 |
12 | 64857925 |
13 | 380331474 |
14 | 2234804775 |
15 | 13155328400 |
16 | 77565394650 |
17 | 458003596050 |
18 | 2707970743326 |
19 | 16030265384752 |
20 | 94997726453172 |
[1,3,8,52,294,1691,9736,56277,326430,1899530, 11085360,64857925,380331474,2234804775, 13155328400,77565394650,458003596050, 2707970743326,16030265384752,94997726453172] |