n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 22 |
4 | 166 |
5 | 1582 |
6 | 18232 |
7 | 246508 |
8 | 3825244 |
9 | 67001212 |
10 | 1307450224 |
11 | 28126466824 |
12 | 661290689416 |
13 | 16869784837288 |
14 | 464080969569184 |
15 | 13694525105228368 |
16 | 431491492805617168 |
17 | 14458331664269020432 |
18 | 513376963627111206976 |
19 | 19255197624159957025888 |
[1,1,4,22,166,1582,18232,246508,3825244,67001212, 1307450224,28126466824,661290689416, 16869784837288,464080969569184,13694525105228368, 431491492805617168,14458331664269020432, 513376963627111206976,19255197624159957025888] |