n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 6 |
5 | 13 |
6 | 29 |
7 | 72 |
8 | 185 |
9 | 499 |
10 | 1414 |
11 | 4132 |
12 | 12554 |
13 | 39332 |
14 | 126815 |
15 | 420769 |
16 | 1430790 |
17 | 4986139 |
18 | 17772536 |
19 | 64708212 |
20 | 240482750 |
21 | 911008926 |
22 | 3515571177 |
23 | 13807269626 |
24 | 55147622607 |
25 | 223864614364 |
26 | 922952281744 |
27 | 3862571220690 |
28 | 16399630000144 |
[1,1,2,3,6,13,29,72,185,499,1414,4132,12554,39332, 126815,420769,1430790,4986139,17772536,64708212, 240482750,911008926,3515571177,13807269626, 55147622607,223864614364,922952281744, 3862571220690,16399630000144] |