n | a(n) |
---|---|
0 | 4 |
1 | 14 |
2 | 44 |
3 | 134 |
4 | 404 |
5 | 1214 |
6 | 3644 |
7 | 10934 |
8 | 32804 |
9 | 98414 |
10 | 295244 |
11 | 885734 |
12 | 2657204 |
13 | 7971614 |
14 | 23914844 |
15 | 71744534 |
16 | 215233604 |
17 | 645700814 |
18 | 1937102444 |
19 | 5811307334 |
20 | 17433922004 |
21 | 52301766014 |
22 | 156905298044 |
23 | 470715894134 |
24 | 1412147682404 |
25 | 4236443047214 |
[4,14,44,134,404,1214,3644,10934,32804,98414, 295244,885734,2657204,7971614,23914844,71744534, 215233604,645700814,1937102444,5811307334, 17433922004,52301766014,156905298044,470715894134, 1412147682404,4236443047214] |