n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 24 |
5 | 60 |
6 | 120 |
7 | 5250 |
8 | 80976 |
9 | 726264 |
10 | 4839120 |
11 | 86487390 |
12 | 2283242280 |
13 | 42585905076 |
14 | 590667519624 |
15 | 10115535833130 |
16 | 286758920451360 |
17 | 8128299117822960 |
18 | 186279550983756576 |
19 | 4123388294626654134 |
20 | 118916807955913504440 |
21 | 4102548791571529697580 |
[1,0,0,6,24,60,120,5250,80976,726264,4839120, 86487390,2283242280,42585905076,590667519624, 10115535833130,286758920451360,8128299117822960, 186279550983756576,4123388294626654134, 118916807955913504440,4102548791571529697580] |