n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 3 |
6 | 13 |
7 | 81 |
8 | 577 |
9 | 4665 |
10 | 42405 |
11 | 427909 |
12 | 4745900 |
13 | 57382240 |
14 | 751185683 |
15 | 10584889175 |
16 | 159735600270 |
17 | 2570291022522 |
18 | 43928610203109 |
19 | 794708493674422 |
20 | 15171707606511701 |
21 | 304813398276280545 |
22 | 6428791672736098775 |
[1,0,0,0,1,3,13,81,577,4665,42405,427909,4745900, 57382240,751185683,10584889175,159735600270, 2570291022522,43928610203109,794708493674422, 15171707606511701,304813398276280545, 6428791672736098775] |