n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 40 |
4 | 326 |
5 | 3492 |
6 | 46558 |
7 | 744320 |
8 | 13889080 |
9 | 296459376 |
10 | 7125938790 |
11 | 190502850972 |
12 | 5607258255032 |
13 | 180198503713952 |
14 | 6278311585490032 |
15 | 235730921392184452 |
16 | 9489040823468191328 |
17 | 407662178549724426176 |
[1,2,7,40,326,3492,46558,744320,13889080, 296459376,7125938790,190502850972,5607258255032, 180198503713952,6278311585490032, 235730921392184452,9489040823468191328, 407662178549724426176] |