n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 27 |
5 | 248 |
6 | 2830 |
7 | 38232 |
8 | 593859 |
9 | 10401712 |
10 | 202601898 |
11 | 4342263000 |
12 | 101551822350 |
13 | 2573779506192 |
14 | 70282204726396 |
15 | 2057490936366320 |
16 | 64291032462761955 |
17 | 2136017303903513184 |
18 | 75197869250518812754 |
19 | 2796475872605709079512 |
20 | 109549714522464120960474 |
21 | 4509302910783496963256400 |
22 | 194584224274515194731540740 |
[1,1,1,4,27,248,2830,38232,593859,10401712, 202601898,4342263000,101551822350,2573779506192, 70282204726396,2057490936366320,64291032462761955, 2136017303903513184,75197869250518812754, 2796475872605709079512,109549714522464120960474, 4509302910783496963256400, 194584224274515194731540740] |