n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 12 |
6 | 32 |
7 | 94 |
8 | 289 |
9 | 910 |
10 | 2934 |
11 | 9686 |
12 | 32540 |
13 | 110780 |
14 | 381676 |
15 | 1328980 |
16 | 4669367 |
17 | 16535154 |
18 | 58965214 |
19 | 211591218 |
20 | 763535450 |
21 | 2769176514 |
22 | 10089240974 |
23 | 36912710568 |
24 | 135565151486 |
25 | 499619269774 |
26 | 1847267563742 |
27 | 6850369296298 |
[1,1,1,2,5,12,32,94,289,910,2934,9686,32540, 110780,381676,1328980,4669367,16535154,58965214, 211591218,763535450,2769176514,10089240974, 36912710568,135565151486,499619269774, 1847267563742,6850369296298] |