n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 6 |
3 | 34 |
4 | 276 |
5 | 2928 |
6 | 38520 |
7 | 606240 |
8 | 11118240 |
9 | 232928640 |
10 | 5488922880 |
11 | 143707737600 |
12 | 4138613740800 |
13 | 130021152307200 |
14 | 4425207423436800 |
15 | 162194949242726400 |
16 | 6369480464675328000 |
17 | 266808295408951296000 |
18 | 11874724735152254976000 |
19 | 559591803705456377856000 |
[0,2,6,34,276,2928,38520,606240,11118240, 232928640,5488922880,143707737600,4138613740800, 130021152307200,4425207423436800, 162194949242726400,6369480464675328000, 266808295408951296000,11874724735152254976000, 559591803705456377856000] |