n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 8 |
3 | 24 |
4 | 72 |
5 | 240 |
6 | 924 |
7 | 4116 |
8 | 20944 |
9 | 119952 |
10 | 763540 |
11 | 5346748 |
12 | 40845816 |
13 | 338041704 |
14 | 3012855356 |
15 | 28770647220 |
16 | 293055401888 |
17 | 3171602665696 |
18 | 36343889387172 |
19 | 439607533130732 |
20 | 5597256953340360 |
21 | 74829813397495128 |
22 | 1048039052970587788 |
23 | 15345654816688856484 |
[0,2,8,24,72,240,924,4116,20944,119952,763540, 5346748,40845816,338041704,3012855356,28770647220, 293055401888,3171602665696,36343889387172, 439607533130732,5597256953340360, 74829813397495128,1048039052970587788, 15345654816688856484] |