n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 28 |
3 | 128 |
4 | 480 |
5 | 1600 |
6 | 4928 |
7 | 14336 |
8 | 39936 |
9 | 107520 |
10 | 281600 |
11 | 720896 |
12 | 1810432 |
13 | 4472832 |
14 | 10895360 |
15 | 26214400 |
16 | 62390272 |
17 | 147062784 |
18 | 343670784 |
19 | 796917760 |
20 | 1835008000 |
21 | 4198498304 |
22 | 9550430208 |
23 | 21609054208 |
24 | 48653926400 |
25 | 109051904000 |
26 | 243403849728 |
27 | 541165879296 |
[0,4,28,128,480,1600,4928,14336,39936,107520, 281600,720896,1810432,4472832,10895360,26214400, 62390272,147062784,343670784,796917760,1835008000, 4198498304,9550430208,21609054208,48653926400, 109051904000,243403849728,541165879296] |