n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 100 |
5 | 1120 |
6 | 15606 |
7 | 260344 |
8 | 5056136 |
9 | 112026240 |
10 | 2788230250 |
11 | 77009739136 |
12 | 2337124786668 |
13 | 77302709780608 |
14 | 2767629599791070 |
15 | 106631592312384000 |
16 | 4398877912885363216 |
17 | 193450993635808976896 |
18 | 9034380526387410161874 |
19 | 446519425974262943518720 |
20 | 23284829853408862172112500 |
[0,1,2,12,100,1120,15606,260344,5056136,112026240, 2788230250,77009739136,2337124786668, 77302709780608,2767629599791070, 106631592312384000,4398877912885363216, 193450993635808976896,9034380526387410161874, 446519425974262943518720, 23284829853408862172112500] |