n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 3 |
5 | 11 |
6 | 58 |
7 | 365 |
8 | 2653 |
9 | 21951 |
10 | 203550 |
11 | 2091015 |
12 | 23571445 |
13 | 289285911 |
14 | 3839613004 |
15 | 54801749237 |
16 | 836972170164 |
17 | 13619819859948 |
18 | 235251433944553 |
19 | 4298685292986838 |
20 | 82847389283019056 |
21 | 1679542528192113596 |
[1,0,0,1,3,11,58,365,2653,21951,203550,2091015, 23571445,289285911,3839613004,54801749237, 836972170164,13619819859948,235251433944553, 4298685292986838,82847389283019056, 1679542528192113596] |