n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 60 |
4 | 192 |
5 | 596 |
6 | 1744 |
7 | 4892 |
8 | 13248 |
9 | 34868 |
10 | 89296 |
11 | 223660 |
12 | 548928 |
13 | 1323060 |
14 | 3137520 |
15 | 7332332 |
16 | 16907584 |
17 | 38517444 |
18 | 86777328 |
19 | 193523404 |
20 | 427562816 |
21 | 936555044 |
22 | 2035286576 |
23 | 4390850268 |
24 | 9409096576 |
25 | 20037827876 |
26 | 42429318480 |
27 | 89369282460 |
28 | 187325508288 |
[1,4,16,60,192,596,1744,4892,13248,34868,89296, 223660,548928,1323060,3137520,7332332,16907584, 38517444,86777328,193523404,427562816,936555044, 2035286576,4390850268,9409096576,20037827876, 42429318480,89369282460,187325508288] |