n | a(n) |
---|---|
3 | 0 |
4 | 12 |
5 | 65 |
6 | 255 |
7 | 882 |
8 | 2870 |
9 | 9039 |
10 | 27945 |
11 | 85448 |
12 | 259512 |
13 | 784797 |
14 | 2366819 |
15 | 7125198 |
16 | 21424938 |
17 | 64373339 |
18 | 193316877 |
19 | 580344132 |
20 | 1741819148 |
21 | 5227030665 |
22 | 15684238119 |
23 | 47059006250 |
24 | 141189602142 |
25 | 423593972775 |
26 | 1270832250545 |
27 | 3812597415552 |
28 | 11437993573920 |
29 | 34314383375669 |
[0,12,65,255,882,2870,9039,27945,85448,259512, 784797,2366819,7125198,21424938,64373339, 193316877,580344132,1741819148,5227030665, 15684238119,47059006250,141189602142,423593972775, 1270832250545,3812597415552,11437993573920, 34314383375669] |