n | a(n) |
---|---|
0 | 3 |
1 | 18 |
2 | 110 |
3 | 684 |
4 | 4322 |
5 | 27708 |
6 | 179930 |
7 | 1181604 |
8 | 7835042 |
9 | 52384428 |
10 | 352707050 |
11 | 2388951924 |
12 | 16262210162 |
13 | 111170407548 |
14 | 762690752570 |
15 | 5248264072644 |
16 | 36206628367682 |
17 | 250320112885068 |
18 | 1733788251844490 |
19 | 12027328411711764 |
[3,18,110,684,4322,27708,179930,1181604,7835042, 52384428,352707050,2388951924,16262210162, 111170407548,762690752570,5248264072644, 36206628367682,250320112885068,1733788251844490, 12027328411711764] |