n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 9 |
4 | 124 |
5 | 1464 |
6 | 15768 |
7 | 159920 |
8 | 1554304 |
9 | 14632704 |
10 | 134378112 |
11 | 1209699584 |
12 | 10713166848 |
13 | 93585811456 |
14 | 808068888576 |
15 | 6907767091200 |
16 | 58538748477440 |
17 | 492296387559424 |
18 | 4112143740076032 |
19 | 34141836642680832 |
20 | 281936660687224832 |
[0,1,9,124,1464,15768,159920,1554304,14632704, 134378112,1209699584,10713166848,93585811456, 808068888576,6907767091200,58538748477440, 492296387559424,4112143740076032, 34141836642680832,281936660687224832] |