n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 47 |
8 | 108 |
9 | 252 |
10 | 582 |
11 | 1345 |
12 | 3086 |
13 | 7072 |
14 | 16121 |
15 | 36667 |
16 | 83099 |
17 | 187885 |
18 | 423610 |
19 | 953033 |
20 | 2139158 |
21 | 4792126 |
22 | 10714105 |
23 | 23911794 |
24 | 53273599 |
25 | 118497834 |
26 | 263164833 |
27 | 583582570 |
28 | 1292276355 |
29 | 2857691087 |
30 | 6311058671 |
31 | 13919982308 |
32 | 30664998056 |
33 | 67473574130 |
[1,1,1,2,4,9,20,47,108,252,582,1345,3086,7072, 16121,36667,83099,187885,423610,953033,2139158, 4792126,10714105,23911794,53273599,118497834, 263164833,583582570,1292276355,2857691087, 6311058671,13919982308,30664998056,67473574130] |