n | a(n) |
---|---|
0 | 3 |
1 | 15 |
2 | 81 |
3 | 453 |
4 | 2571 |
5 | 14679 |
6 | 84009 |
7 | 481245 |
8 | 2757843 |
9 | 15806559 |
10 | 90600513 |
11 | 519318837 |
12 | 2976744027 |
13 | 17062807335 |
14 | 97804786329 |
15 | 560621795277 |
16 | 3213512139939 |
17 | 18420013780911 |
18 | 105584452428081 |
19 | 605215440272805 |
[3,15,81,453,2571,14679,84009,481245,2757843, 15806559,90600513,519318837,2976744027, 17062807335,97804786329,560621795277, 3213512139939,18420013780911,105584452428081, 605215440272805] |