n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 2 |
6 | 6 |
7 | 14 |
8 | 37 |
9 | 92 |
10 | 239 |
11 | 613 |
12 | 1607 |
13 | 4215 |
14 | 11185 |
15 | 29814 |
16 | 80070 |
17 | 216061 |
18 | 586218 |
19 | 1597292 |
20 | 4370721 |
21 | 12003163 |
22 | 33077327 |
23 | 91431425 |
24 | 253454781 |
25 | 704425087 |
26 | 1962537755 |
27 | 5479843060 |
28 | 15332668869 |
29 | 42983623237 |
30 | 120716987723 |
31 | 339595975795 |
32 | 956840683968 |
[0,0,0,1,2,6,14,37,92,239,613,1607,4215,11185, 29814,80070,216061,586218,1597292,4370721, 12003163,33077327,91431425,253454781,704425087, 1962537755,5479843060,15332668869,42983623237, 120716987723,339595975795,956840683968] |