n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 9 |
3 | 80 |
4 | 711 |
5 | 6319 |
6 | 56160 |
7 | 499121 |
8 | 4435929 |
9 | 39424240 |
10 | 350382231 |
11 | 3114015839 |
12 | 27675760320 |
13 | 245967827041 |
14 | 2186034683049 |
15 | 19428344320400 |
16 | 172669064200551 |
17 | 1534593233484559 |
18 | 13638670037160480 |
19 | 121213437100959761 |
[0,1,9,80,711,6319,56160,499121,4435929,39424240, 350382231,3114015839,27675760320,245967827041, 2186034683049,19428344320400,172669064200551, 1534593233484559,13638670037160480, 121213437100959761] |