n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 25 |
4 | 66 |
5 | 168 |
6 | 416 |
7 | 1008 |
8 | 2400 |
9 | 5632 |
10 | 13056 |
11 | 29952 |
12 | 68096 |
13 | 153600 |
14 | 344064 |
15 | 765952 |
16 | 1695744 |
17 | 3735552 |
18 | 8192000 |
19 | 17891328 |
20 | 38928384 |
21 | 84410368 |
22 | 182452224 |
23 | 393216000 |
24 | 845152256 |
25 | 1811939328 |
26 | 3875536896 |
27 | 8271167488 |
28 | 17616076800 |
[1,3,9,25,66,168,416,1008,2400,5632,13056,29952, 68096,153600,344064,765952,1695744,3735552, 8192000,17891328,38928384,84410368,182452224, 393216000,845152256,1811939328,3875536896, 8271167488,17616076800] |