n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 30 |
3 | 180 |
4 | 1080 |
5 | 6480 |
6 | 38880 |
7 | 233280 |
8 | 1399680 |
9 | 8398080 |
10 | 50388480 |
11 | 302330880 |
12 | 1813985280 |
13 | 10883911680 |
14 | 65303470080 |
15 | 391820820480 |
16 | 2350924922880 |
17 | 14105549537280 |
18 | 84633297223680 |
19 | 507799783342080 |
[1,5,30,180,1080,6480,38880,233280,1399680, 8398080,50388480,302330880,1813985280,10883911680, 65303470080,391820820480,2350924922880, 14105549537280,84633297223680,507799783342080] |