n | a(n) |
---|---|
1 | 0 |
2 | 9 |
3 | 52 |
4 | 364 |
5 | 2523 |
6 | 17424 |
7 | 120462 |
8 | 832701 |
9 | 5756112 |
10 | 39789720 |
11 | 275050323 |
12 | 1901312388 |
13 | 13143008754 |
14 | 90852339501 |
15 | 628025724756 |
16 | 4341289537476 |
17 | 30009590539371 |
18 | 207444243598344 |
19 | 1433978719090182 |
20 | 9912518810524413 |
[0,9,52,364,2523,17424,120462,832701,5756112, 39789720,275050323,1901312388,13143008754, 90852339501,628025724756,4341289537476, 30009590539371,207444243598344,1433978719090182, 9912518810524413] |