n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 2 |
9 | 72 |
10 | 1496 |
11 | 25384 |
12 | 399848 |
13 | 6231544 |
14 | 99133496 |
15 | 1634227958 |
16 | 28120703888 |
17 | 506599465896 |
18 | 9562489659952 |
19 | 189055933191880 |
20 | 3911226769004280 |
[1,1,0,0,0,0,0,0,2,72,1496,25384,399848,6231544, 99133496,1634227958,28120703888,506599465896, 9562489659952,189055933191880,3911226769004280] |