n | a(n) |
---|---|
0 | 0 |
1 | 18 |
2 | 252 |
3 | 2520 |
4 | 22320 |
5 | 187488 |
6 | 1536192 |
7 | 12435840 |
8 | 100074240 |
9 | 802948608 |
10 | 6433016832 |
11 | 51501864960 |
12 | 412165877760 |
13 | 3297930928128 |
14 | 26385863196672 |
15 | 211096568954880 |
16 | 1688811205754880 |
17 | 13510644263682048 |
[0,18,252,2520,22320,187488,1536192,12435840, 100074240,802948608,6433016832,51501864960, 412165877760,3297930928128,26385863196672, 211096568954880,1688811205754880, 13510644263682048] |