n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | 12 |
4 | 128 |
5 | 1040 |
6 | 12672 |
7 | 161728 |
8 | 2481152 |
9 | 41806080 |
10 | 791613440 |
11 | 16399944704 |
12 | 371591995392 |
13 | 9110211874816 |
14 | 240670782291968 |
15 | 6810264853463040 |
16 | 205583847590985728 |
17 | 6593508525460226048 |
18 | 223913466256013918208 |
19 | 8026367531323488993280 |
[1,0,4,12,128,1040,12672,161728,2481152,41806080, 791613440,16399944704,371591995392,9110211874816, 240670782291968,6810264853463040, 205583847590985728,6593508525460226048, 223913466256013918208,8026367531323488993280] |