n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 72 |
5 | 825 |
6 | 12192 |
7 | 220353 |
8 | 4708480 |
9 | 116116497 |
10 | 3245839360 |
11 | 101415497689 |
12 | 3502465714176 |
13 | 132486192976137 |
14 | 5447446920323072 |
15 | 241907419042038225 |
16 | 11538444129924055040 |
17 | 588321821566662253729 |
18 | 31932991994214557417472 |
[0,1,2,9,72,825,12192,220353,4708480,116116497, 3245839360,101415497689,3502465714176, 132486192976137,5447446920323072, 241907419042038225,11538444129924055040, 588321821566662253729,31932991994214557417472] |