n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 47 |
8 | 112 |
9 | 279 |
10 | 701 |
11 | 1794 |
12 | 4636 |
13 | 12130 |
14 | 31987 |
15 | 85062 |
16 | 227673 |
17 | 613126 |
18 | 1659712 |
19 | 4514249 |
20 | 12329670 |
21 | 33804673 |
22 | 93001852 |
23 | 256667215 |
24 | 710381240 |
25 | 1971312184 |
26 | 5483656721 |
27 | 15288227949 |
28 | 42711458197 |
29 | 119555284629 |
30 | 335253287132 |
[0,1,1,2,4,9,20,47,112,279,701,1794,4636,12130, 31987,85062,227673,613126,1659712,4514249, 12329670,33804673,93001852,256667215,710381240, 1971312184,5483656721,15288227949,42711458197, 119555284629,335253287132] |