n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 8 |
4 | 22 |
5 | 52 |
6 | 132 |
7 | 324 |
8 | 808 |
9 | 2000 |
10 | 4968 |
11 | 12320 |
12 | 30576 |
13 | 75856 |
14 | 188224 |
15 | 467008 |
16 | 1158752 |
17 | 2875072 |
18 | 7133632 |
19 | 17699904 |
20 | 43916928 |
21 | 108966400 |
22 | 270366848 |
23 | 670832640 |
24 | 1664466176 |
25 | 4129863936 |
26 | 10246994944 |
27 | 25424785408 |
28 | 63083832832 |
[1,1,4,8,22,52,132,324,808,2000,4968,12320,30576, 75856,188224,467008,1158752,2875072,7133632, 17699904,43916928,108966400,270366848,670832640, 1664466176,4129863936,10246994944,25424785408, 63083832832] |