n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 2 |
4 | 12 |
5 | 74 |
6 | 538 |
7 | 4682 |
8 | 47280 |
9 | 545832 |
10 | 7087186 |
11 | 102247562 |
12 | 1622632020 |
13 | 28091567594 |
14 | 526858343698 |
15 | 10641342970366 |
16 | 230283190930560 |
17 | 5315654681981354 |
18 | 130370767028589528 |
19 | 3385534663256845322 |
[0,1,0,2,12,74,538,4682,47280,545832,7087186, 102247562,1622632020,28091567594,526858343698, 10641342970366,230283190930560,5315654681981354, 130370767028589528,3385534663256845322] |