n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 648 |
3 | 17712 |
4 | 179334 |
5 | 1043280 |
6 | 4517208 |
7 | 15781392 |
8 | 44619984 |
9 | 116385552 |
10 | 272587680 |
11 | 572320080 |
12 | 1157871078 |
13 | 2232349632 |
14 | 3924968400 |
15 | 6928383600 |
16 | 11708537526 |
17 | 18624904128 |
18 | 29674012392 |
19 | 46479068784 |
[1,0,648,17712,179334,1043280,4517208,15781392, 44619984,116385552,272587680,572320080,1157871078, 2232349632,3924968400,6928383600,11708537526, 18624904128,29674012392,46479068784] |