n | a(n) |
---|---|
1 | 6 |
2 | 48 |
3 | 380 |
4 | 2860 |
5 | 19896 |
6 | 129648 |
7 | 810964 |
8 | 4962056 |
9 | 30034672 |
10 | 180893724 |
11 | 1087112084 |
12 | 6527090276 |
13 | 39173693352 |
14 | 235070531992 |
15 | 1410496377492 |
16 | 8463170413616 |
17 | 50779536937024 |
18 | 304678626418660 |
19 | 1828075665965204 |
20 | 10968465043204908 |
[6,48,380,2860,19896,129648,810964,4962056, 30034672,180893724,1087112084,6527090276, 39173693352,235070531992,1410496377492, 8463170413616,50779536937024,304678626418660, 1828075665965204,10968465043204908] |