n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 84 |
4 | 588 |
5 | 4116 |
6 | 28812 |
7 | 201684 |
8 | 1411788 |
9 | 9882516 |
10 | 69177612 |
11 | 484243284 |
12 | 3389702988 |
13 | 23727920916 |
14 | 166095446412 |
15 | 1162668124884 |
16 | 8138676874188 |
17 | 56970738119316 |
18 | 398795166835212 |
19 | 2791566167846484 |
20 | 19540963174925388 |
[1,3,12,84,588,4116,28812,201684,1411788,9882516, 69177612,484243284,3389702988,23727920916, 166095446412,1162668124884,8138676874188, 56970738119316,398795166835212,2791566167846484, 19540963174925388] |