n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 2 |
4 | 10 |
5 | 48 |
6 | 256 |
7 | 1670 |
8 | 12846 |
9 | 112820 |
10 | 1108612 |
11 | 12032154 |
12 | 142852450 |
13 | 1840969784 |
14 | 25587270600 |
15 | 381460235918 |
16 | 6071318154166 |
17 | 102742200205980 |
18 | 1841978156709676 |
19 | 34874169034136930 |
20 | 695294184953602602 |
21 | 14560120360421802464 |
22 | 319510983674891800240 |
[0,0,0,2,10,48,256,1670,12846,112820,1108612, 12032154,142852450,1840969784,25587270600, 381460235918,6071318154166,102742200205980, 1841978156709676,34874169034136930, 695294184953602602,14560120360421802464, 319510983674891800240] |