n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 1 |
7 | 2 |
8 | 6 |
9 | 16 |
10 | 60 |
11 | 266 |
12 | 1547 |
13 | 10786 |
14 | 88193 |
15 | 805579 |
16 | 8037796 |
17 | 86223660 |
18 | 985883873 |
19 | 11946592242 |
20 | 152808993767 |
21 | 2056701139136 |
22 | 29051369533596 |
23 | 429669276147047 |
24 | 6640178380127244 |
25 | 107026751932268789 |
26 | 1796103830404560857 |
27 | 31334029441145918974 |
28 | 567437704731717802783 |
[1,0,0,0,0,1,1,2,6,16,60,266,1547,10786,88193, 805579,8037796,86223660,985883873,11946592242, 152808993767,2056701139136,29051369533596, 429669276147047,6640178380127244, 107026751932268789,1796103830404560857, 31334029441145918974,567437704731717802783] |