n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 20 |
7 | 48 |
8 | 115 |
9 | 286 |
10 | 719 |
11 | 1841 |
12 | 4763 |
13 | 12477 |
14 | 32947 |
15 | 87735 |
16 | 235162 |
17 | 634212 |
18 | 1719325 |
19 | 4683368 |
20 | 12810871 |
21 | 35177357 |
22 | 96926335 |
23 | 267909285 |
24 | 742641309 |
25 | 2064029034 |
26 | 5750500663 |
27 | 16057186086 |
28 | 44929879114 |
29 | 125962026154 |
30 | 353773417487 |
31 | 995269027339 |
[1,1,1,2,4,9,20,48,115,286,719,1841,4763,12477, 32947,87735,235162,634212,1719325,4683368, 12810871,35177357,96926335,267909285,742641309, 2064029034,5750500663,16057186086,44929879114, 125962026154,353773417487,995269027339] |