n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 36 |
4 | 172 |
5 | 860 |
6 | 4460 |
7 | 23820 |
8 | 130268 |
9 | 726236 |
10 | 4112972 |
11 | 23599724 |
12 | 136906748 |
13 | 801671996 |
14 | 4732110828 |
15 | 28128179276 |
16 | 168222049052 |
17 | 1011509012636 |
18 | 6111445499532 |
19 | 37084090264364 |
20 | 225899543897916 |
21 | 1380918157453052 |
22 | 8468524718133804 |
23 | 52085281291575052 |
[1,2,8,36,172,860,4460,23820,130268,726236, 4112972,23599724,136906748,801671996,4732110828, 28128179276,168222049052,1011509012636, 6111445499532,37084090264364,225899543897916, 1380918157453052,8468524718133804, 52085281291575052] |