n | a(n) |
---|---|
1 | 0 |
2 | 9 |
3 | 34 |
4 | 123 |
5 | 748 |
6 | 3698 |
7 | 17443 |
8 | 84737 |
9 | 414665 |
10 | 2005125 |
11 | 9713004 |
12 | 47127519 |
13 | 228570355 |
14 | 1108064547 |
15 | 5372882058 |
16 | 26053821399 |
17 | 126333862510 |
18 | 612577288197 |
19 | 2970352085648 |
20 | 14403091243503 |
21 | 69839730071000 |
22 | 338648374694336 |
[0,9,34,123,748,3698,17443,84737,414665,2005125, 9713004,47127519,228570355,1108064547,5372882058, 26053821399,126333862510,612577288197, 2970352085648,14403091243503,69839730071000, 338648374694336] |