n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 54 |
4 | 1944 |
5 | 99000 |
6 | 6966000 |
7 | 655678800 |
8 | 80103945600 |
9 | 12372954249600 |
10 | 2362712677920000 |
11 | 547235129437920000 |
12 | 151247218046601600000 |
13 | 49191138900262719360000 |
14 | 18601307697723249058560000 |
15 | 8093164859945489259936000000 |
16 | 4014620173473616480790016000000 |
[0,2,54,1944,99000,6966000,655678800,80103945600, 12372954249600,2362712677920000, 547235129437920000,151247218046601600000, 49191138900262719360000, 18601307697723249058560000, 8093164859945489259936000000, 4014620173473616480790016000000] |