n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 45 |
3 | 285 |
4 | 1695 |
5 | 10317 |
6 | 62349 |
7 | 377739 |
8 | 2286648 |
9 | 13846117 |
10 | 83833256 |
11 | 507596153 |
12 | 3073376281 |
13 | 18608642427 |
14 | 112671254094 |
15 | 682200039446 |
16 | 4130572919575 |
17 | 25009722123505 |
18 | 151428434581516 |
19 | 916866281219258 |
[1,9,45,285,1695,10317,62349,377739,2286648, 13846117,83833256,507596153,3073376281, 18608642427,112671254094,682200039446, 4130572919575,25009722123505,151428434581516, 916866281219258] |