n | a(n) |
---|---|
0 | 1 |
1 | 27 |
2 | 405 |
3 | 4455 |
4 | 40095 |
5 | 312741 |
6 | 2189187 |
7 | 14073345 |
8 | 84440070 |
9 | 478493730 |
10 | 2583866142 |
11 | 13389124554 |
12 | 66945622770 |
13 | 324428787270 |
14 | 1529449997130 |
15 | 7035469986798 |
16 | 31659614940591 |
17 | 139674771796725 |
18 | 605257344452475 |
[1,27,405,4455,40095,312741,2189187,14073345, 84440070,478493730,2583866142,13389124554, 66945622770,324428787270,1529449997130, 7035469986798,31659614940591,139674771796725, 605257344452475] |