n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 48 |
4 | 141 |
5 | 396 |
6 | 1058 |
7 | 2696 |
8 | 6646 |
9 | 15884 |
10 | 36956 |
11 | 83976 |
12 | 186849 |
13 | 407864 |
14 | 875030 |
15 | 1847824 |
16 | 3845520 |
17 | 7895872 |
18 | 16010610 |
19 | 32088120 |
20 | 63611656 |
21 | 124817444 |
22 | 242560418 |
23 | 467095640 |
24 | 891754784 |
25 | 1688619460 |
[1,4,14,48,141,396,1058,2696,6646,15884,36956, 83976,186849,407864,875030,1847824,3845520, 7895872,16010610,32088120,63611656,124817444, 242560418,467095640,891754784,1688619460] |