n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 57 |
3 | 400 |
4 | 2810 |
5 | 19824 |
6 | 140497 |
7 | 999968 |
8 | 7143966 |
9 | 51206320 |
10 | 368094122 |
11 | 2652720096 |
12 | 19159794004 |
13 | 138658606688 |
14 | 1005231020865 |
15 | 7299082678336 |
16 | 53074479789878 |
17 | 386419850997552 |
18 | 2816685368479342 |
19 | 20553133273532000 |
20 | 150120362670452076 |
[1,8,57,400,2810,19824,140497,999968,7143966, 51206320,368094122,2652720096,19159794004, 138658606688,1005231020865,7299082678336, 53074479789878,386419850997552,2816685368479342, 20553133273532000,150120362670452076] |