n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 2 |
7 | 2 |
8 | 6 |
9 | 12 |
10 | 30 |
11 | 76 |
12 | 224 |
13 | 597 |
14 | 1801 |
15 | 5469 |
16 | 16958 |
17 | 53308 |
18 | 169872 |
19 | 548344 |
20 | 1791949 |
21 | 5915441 |
22 | 19700851 |
23 | 66148464 |
24 | 223751776 |
25 | 761919971 |
26 | 2610778118 |
27 | 8998428171 |
28 | 31179152130 |
29 | 108577507149 |
30 | 379879051198 |
[1,1,1,1,1,2,2,6,12,30,76,224,597,1801,5469,16958, 53308,169872,548344,1791949,5915441,19700851, 66148464,223751776,761919971,2610778118, 8998428171,31179152130,108577507149,379879051198] |