n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 84 |
5 | 924 |
6 | 2772 |
7 | 80388 |
8 | 3778236 |
9 | 71786484 |
10 | 2943245844 |
11 | 585705922956 |
12 | 13471236227988 |
13 | 7018514074781748 |
14 | 1972202455013671188 |
15 | 61138276105423806828 |
16 | 134932175364670341669396 |
17 | 481842798227237790101413116 |
18 | 154671538230943330622553610236 |
[1,3,12,84,924,2772,80388,3778236,71786484, 2943245844,585705922956,13471236227988, 7018514074781748,1972202455013671188, 61138276105423806828,134932175364670341669396, 481842798227237790101413116, 154671538230943330622553610236] |