n | a(n) |
---|---|
0 | 4 |
1 | 24 |
2 | 120 |
3 | 560 |
4 | 2520 |
5 | 11088 |
6 | 48048 |
7 | 205920 |
8 | 875160 |
9 | 3695120 |
10 | 15519504 |
11 | 64899744 |
12 | 270415600 |
13 | 1123264800 |
14 | 4653525600 |
15 | 19234572480 |
16 | 79342611480 |
17 | 326704870800 |
18 | 1343120024400 |
19 | 5513861152800 |
20 | 22606830726480 |
21 | 92580354403680 |
22 | 378737813469600 |
[4,24,120,560,2520,11088,48048,205920,875160, 3695120,15519504,64899744,270415600,1123264800, 4653525600,19234572480,79342611480,326704870800, 1343120024400,5513861152800,22606830726480, 92580354403680,378737813469600] |