n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 54 |
4 | 326 |
5 | 1957 |
6 | 11745 |
7 | 70470 |
8 | 422822 |
9 | 2536933 |
10 | 15221601 |
11 | 91329606 |
12 | 547977638 |
13 | 3287865829 |
14 | 19727194977 |
15 | 118363169862 |
16 | 710179019174 |
17 | 4261074115045 |
18 | 25566444690273 |
19 | 153398668141638 |
20 | 920392008849830 |
21 | 5522352053098981 |
[1,9,54,326,1957,11745,70470,422822,2536933, 15221601,91329606,547977638,3287865829, 19727194977,118363169862,710179019174, 4261074115045,25566444690273,153398668141638, 920392008849830,5522352053098981] |