n | a(n) |
---|---|
2 | 3 |
3 | 12 |
4 | 38 |
5 | 110 |
6 | 302 |
7 | 806 |
8 | 2109 |
9 | 5450 |
10 | 13917 |
11 | 35224 |
12 | 88464 |
13 | 220608 |
14 | 546734 |
15 | 1347290 |
16 | 3302716 |
17 | 8057268 |
18 | 19568800 |
19 | 47329156 |
20 | 114025658 |
21 | 273709580 |
22 | 654765164 |
23 | 1561257760 |
24 | 3711372761 |
25 | 8797021430 |
26 | 20794198251 |
27 | 49024480496 |
28 | 115292809466 |
29 | 270495295124 |
30 | 633186396954 |
[3,12,38,110,302,806,2109,5450,13917,35224,88464, 220608,546734,1347290,3302716,8057268,19568800, 47329156,114025658,273709580,654765164,1561257760, 3711372761,8797021430,20794198251,49024480496, 115292809466,270495295124,633186396954] |