n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 8 |
4 | 24 |
5 | 60 |
6 | 168 |
7 | 448 |
8 | 1232 |
9 | 3344 |
10 | 9152 |
11 | 24960 |
12 | 68224 |
13 | 186304 |
14 | 509056 |
15 | 1390592 |
16 | 3799296 |
17 | 10379520 |
18 | 28357632 |
19 | 77473792 |
20 | 211662848 |
21 | 578272256 |
22 | 1579870208 |
23 | 4316282880 |
24 | 11792306176 |
25 | 32217174016 |
26 | 88018960384 |
27 | 240472260608 |
[1,1,4,8,24,60,168,448,1232,3344,9152,24960,68224, 186304,509056,1390592,3799296,10379520,28357632, 77473792,211662848,578272256,1579870208, 4316282880,11792306176,32217174016,88018960384, 240472260608] |