n | a(n) |
---|---|
1 | 4 |
2 | 16 |
3 | 64 |
4 | 250 |
5 | 964 |
6 | 3674 |
7 | 13868 |
8 | 51917 |
9 | 192980 |
10 | 712868 |
11 | 2618876 |
12 | 9573915 |
13 | 34845780 |
14 | 126322410 |
15 | 456285828 |
16 | 1642687662 |
17 | 5895922368 |
18 | 21102304252 |
19 | 75332038300 |
20 | 268275675007 |
21 | 953247943192 |
22 | 3380004168904 |
23 | 11961143709736 |
24 | 42249741430325 |
[4,16,64,250,964,3674,13868,51917,192980,712868, 2618876,9573915,34845780,126322410,456285828, 1642687662,5895922368,21102304252,75332038300, 268275675007,953247943192,3380004168904, 11961143709736,42249741430325] |