n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 117 |
3 | 891 |
4 | 6777 |
5 | 51543 |
6 | 392013 |
7 | 2981475 |
8 | 22675761 |
9 | 172461663 |
10 | 1311666021 |
11 | 9975943179 |
12 | 75872547369 |
13 | 577052549415 |
14 | 4388802753213 |
15 | 33379264377459 |
16 | 253867706760033 |
17 | 1930803860947887 |
18 | 14684827767302997 |
19 | 111686210555580315 |
20 | 849435201142733529 |
21 | 6460422977475127287 |
[1,15,117,891,6777,51543,392013,2981475,22675761, 172461663,1311666021,9975943179,75872547369, 577052549415,4388802753213,33379264377459, 253867706760033,1930803860947887, 14684827767302997,111686210555580315, 849435201142733529,6460422977475127287] |