n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 5 |
6 | 10 |
7 | 31 |
8 | 72 |
9 | 201 |
10 | 509 |
11 | 1374 |
12 | 3587 |
13 | 9647 |
14 | 25686 |
15 | 69348 |
16 | 187052 |
17 | 508480 |
18 | 1384959 |
19 | 3791466 |
20 | 10407842 |
21 | 28677319 |
22 | 79231664 |
23 | 219557624 |
24 | 609922977 |
25 | 1698526750 |
26 | 4740469708 |
27 | 13258136509 |
28 | 37151664771 |
29 | 104294992317 |
30 | 293279485007 |
[1,0,1,1,5,10,31,72,201,509,1374,3587,9647,25686, 69348,187052,508480,1384959,3791466,10407842, 28677319,79231664,219557624,609922977,1698526750, 4740469708,13258136509,37151664771,104294992317, 293279485007] |