n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 30 |
5 | 107 |
6 | 396 |
7 | 1513 |
8 | 5915 |
9 | 23554 |
10 | 95202 |
11 | 389555 |
12 | 1610588 |
13 | 6717816 |
14 | 28234064 |
15 | 119452553 |
16 | 508330809 |
17 | 2174393331 |
18 | 9343913933 |
19 | 40319400738 |
20 | 174630125428 |
21 | 758916134002 |
22 | 3308320668768 |
23 | 14462616815619 |
24 | 63388694309005 |
25 | 278492994845776 |
26 | 1226241871745376 |
[1,1,3,9,30,107,396,1513,5915,23554,95202,389555, 1610588,6717816,28234064,119452553,508330809, 2174393331,9343913933,40319400738,174630125428, 758916134002,3308320668768,14462616815619, 63388694309005,278492994845776,1226241871745376] |