n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 6 |
5 | 37 |
6 | 256 |
7 | 1999 |
8 | 17490 |
9 | 169895 |
10 | 1816320 |
11 | 21205745 |
12 | 268547510 |
13 | 3667187645 |
14 | 53722014720 |
15 | 840455448415 |
16 | 13985762375970 |
17 | 246675543859855 |
18 | 4596826887347200 |
19 | 90249727067243425 |
20 | 1861971659969854950 |
21 | 40274219840308939925 |
[1,0,1,6,37,256,1999,17490,169895,1816320, 21205745,268547510,3667187645,53722014720, 840455448415,13985762375970,246675543859855, 4596826887347200,90249727067243425, 1861971659969854950,40274219840308939925] |