n | a(n) |
---|---|
1 | 6 |
2 | 18 |
3 | 48 |
4 | 141 |
5 | 431 |
6 | 1427 |
7 | 4692 |
8 | 15417 |
9 | 52833 |
10 | 189576 |
11 | 667458 |
12 | 2303485 |
13 | 8261483 |
14 | 30854617 |
15 | 112235989 |
16 | 396544978 |
17 | 1457813051 |
18 | 5573491517 |
19 | 20668205325 |
20 | 74283571059 |
21 | 277368667214 |
22 | 1076038620556 |
23 | 4041473193751 |
24 | 14706699067814 |
[6,18,48,141,431,1427,4692,15417,52833,189576, 667458,2303485,8261483,30854617,112235989, 396544978,1457813051,5573491517,20668205325, 74283571059,277368667214,1076038620556, 4041473193751,14706699067814] |