n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 380 |
3 | 7030 |
4 | 129960 |
5 | 2400840 |
6 | 44352270 |
7 | 819332820 |
8 | 15135787980 |
9 | 279607936230 |
10 | 5165281123560 |
11 | 95419783331640 |
12 | 1762718203098270 |
13 | 32563220683609620 |
14 | 601550117011031580 |
15 | 11112615265773737430 |
[1,20,380,7030,129960,2400840,44352270,819332820, 15135787980,279607936230,5165281123560, 95419783331640,1762718203098270,32563220683609620, 601550117011031580,11112615265773737430] |