n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 62 |
4 | 232 |
5 | 842 |
6 | 2980 |
7 | 10334 |
8 | 35248 |
9 | 118610 |
10 | 394684 |
11 | 1301126 |
12 | 4255624 |
13 | 13825658 |
14 | 44657428 |
15 | 143521838 |
16 | 459230560 |
17 | 1463719586 |
18 | 4649308012 |
19 | 14722502870 |
20 | 46491507256 |
21 | 146447041994 |
22 | 460259735236 |
23 | 1443537130622 |
[1,4,16,62,232,842,2980,10334,35248,118610,394684, 1301126,4255624,13825658,44657428,143521838, 459230560,1463719586,4649308012,14722502870, 46491507256,146447041994,460259735236, 1443537130622] |