n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 54 |
5 | 260 |
6 | 1310 |
7 | 6824 |
8 | 36478 |
9 | 199094 |
10 | 1105478 |
11 | 6227712 |
12 | 35520498 |
13 | 204773400 |
14 | 1191572004 |
15 | 6990859416 |
16 | 41313818217 |
17 | 245735825082 |
18 | 1470125583756 |
19 | 8840948601024 |
20 | 53417237877396 |
21 | 324123222435804 |
22 | 1974317194619712 |
[1,3,12,54,260,1310,6824,36478,199094,1105478, 6227712,35520498,204773400,1191572004,6990859416, 41313818217,245735825082,1470125583756, 8840948601024,53417237877396,324123222435804, 1974317194619712] |