n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 33 |
3 | 232 |
4 | 1596 |
5 | 10945 |
6 | 75024 |
7 | 514228 |
8 | 3524577 |
9 | 24157816 |
10 | 165580140 |
11 | 1134903169 |
12 | 7778742048 |
13 | 53316291172 |
14 | 365435296161 |
15 | 2504730781960 |
16 | 17167680177564 |
17 | 117669030460993 |
18 | 806515533049392 |
19 | 5527939700884756 |
20 | 37889062373143905 |
21 | 259695496911122584 |
[0,4,33,232,1596,10945,75024,514228,3524577, 24157816,165580140,1134903169,7778742048, 53316291172,365435296161,2504730781960, 17167680177564,117669030460993,806515533049392, 5527939700884756,37889062373143905, 259695496911122584] |