n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 3 |
4 | 32 |
5 | 210 |
6 | 2184 |
7 | 26460 |
8 | 373344 |
9 | 6150816 |
10 | 113958720 |
11 | 2362345920 |
12 | 54094694400 |
13 | 1355708296800 |
14 | 36926213869440 |
15 | 1085886303989760 |
16 | 34291129916574720 |
17 | 1157362522046277120 |
18 | 41576054625791078400 |
19 | 1583864892141097098240 |
20 | 63779322541075124428800 |
[1,0,2,3,32,210,2184,26460,373344,6150816, 113958720,2362345920,54094694400,1355708296800, 36926213869440,1085886303989760,34291129916574720, 1157362522046277120,41576054625791078400, 1583864892141097098240,63779322541075124428800] |