n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 80 |
3 | 1444 |
4 | 25920 |
5 | 465124 |
6 | 8346320 |
7 | 149768644 |
8 | 2687489280 |
9 | 48225038404 |
10 | 865363202000 |
11 | 15528312597604 |
12 | 278644263554880 |
13 | 5000068431390244 |
14 | 89722587501469520 |
15 | 1610006506595061124 |
16 | 28890394531209630720 |
17 | 518417095055178291844 |
18 | 9302617316461999622480 |
[0,4,80,1444,25920,465124,8346320,149768644, 2687489280,48225038404,865363202000, 15528312597604,278644263554880,5000068431390244, 89722587501469520,1610006506595061124, 28890394531209630720,518417095055178291844, 9302617316461999622480] |