n | a(n) |
---|---|
1 | 1 |
2 | 6 |
3 | 96 |
4 | 576 |
5 | 5180 |
6 | 28836 |
7 | 222887 |
8 | 1241310 |
9 | 8712264 |
10 | 48837168 |
11 | 328280478 |
12 | 1854039060 |
13 | 12126536066 |
14 | 69047705664 |
15 | 443482507552 |
16 | 2544063717888 |
17 | 16136462307440 |
18 | 93109093464048 |
19 | 585311170019020 |
20 | 3393940344415872 |
[1,6,96,576,5180,28836,222887,1241310,8712264, 48837168,328280478,1854039060,12126536066, 69047705664,443482507552,2544063717888, 16136462307440,93109093464048,585311170019020, 3393940344415872] |