n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 50 |
3 | 364 |
4 | 2696 |
5 | 20272 |
6 | 154400 |
7 | 1188544 |
8 | 9228416 |
9 | 72147712 |
10 | 567104000 |
11 | 4476365824 |
12 | 35448129536 |
13 | 281408253952 |
14 | 2238205337600 |
15 | 17827278536704 |
16 | 142148043309056 |
17 | 1134363236564992 |
18 | 9057979233075200 |
19 | 72362273907933184 |
[1,7,50,364,2696,20272,154400,1188544,9228416, 72147712,567104000,4476365824,35448129536, 281408253952,2238205337600,17827278536704, 142148043309056,1134363236564992,9057979233075200, 72362273907933184] |