n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 21 |
3 | 111 |
4 | 633 |
5 | 3531 |
6 | 19821 |
7 | 111063 |
8 | 622641 |
9 | 3490131 |
10 | 19564293 |
11 | 109668351 |
12 | 614752041 |
13 | 3446023323 |
14 | 19316861661 |
15 | 108281656551 |
16 | 606978381153 |
17 | 3402448433571 |
18 | 19072599164661 |
19 | 106912432560783 |
20 | 599303122725081 |
[1,3,21,111,633,3531,19821,111063,622641,3490131, 19564293,109668351,614752041,3446023323, 19316861661,108281656551,606978381153, 3402448433571,19072599164661,106912432560783, 599303122725081] |