n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 2 |
9 | 3 |
10 | 6 |
11 | 9 |
12 | 14 |
13 | 23 |
14 | 61 |
15 | 135 |
16 | 392 |
17 | 922 |
18 | 2676 |
19 | 7151 |
20 | 26809 |
21 | 87678 |
22 | 375597 |
23 | 1374921 |
24 | 6569486 |
25 | 27726558 |
26 | 157145315 |
27 | 778948913 |
28 | 5094691047 |
29 | 28915328479 |
30 | 216796412908 |
[1,1,1,1,1,1,1,2,3,6,9,14,23,61,135,392,922,2676, 7151,26809,87678,375597,1374921,6569486,27726558, 157145315,778948913,5094691047,28915328479, 216796412908] |