n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 12 |
4 | 48 |
5 | 296 |
6 | 3040 |
7 | 54256 |
8 | 1716608 |
9 | 97213472 |
10 | 9937755904 |
11 | 1849103423168 |
12 | 631027551238656 |
13 | 397616229914793600 |
14 | 465313769910614218240 |
15 | 1016485858155549165160192 |
16 | 4163516302794478683289989120 |
17 | 32101177200132015985353543496192 |
18 | 467507173926886632279989196725442560 |
[1,2,4,12,48,296,3040,54256,1716608,97213472, 9937755904,1849103423168,631027551238656, 397616229914793600,465313769910614218240, 1016485858155549165160192, 4163516302794478683289989120, 32101177200132015985353543496192, 467507173926886632279989196725442560] |