n | a(n) |
---|---|
1 | 2 |
2 | 45 |
3 | 178 |
4 | 918 |
5 | 4910 |
6 | 24408 |
7 | 124399 |
8 | 641663 |
9 | 3271834 |
10 | 16747810 |
11 | 85795064 |
12 | 438971334 |
13 | 2247194765 |
14 | 11504929439 |
15 | 58893248470 |
16 | 301494626010 |
17 | 1543466274885 |
18 | 7901476939284 |
19 | 40450502258451 |
20 | 207080879283742 |
21 | 1060121076327341 |
[2,45,178,918,4910,24408,124399,641663,3271834, 16747810,85795064,438971334,2247194765, 11504929439,58893248470,301494626010, 1543466274885,7901476939284,40450502258451, 207080879283742,1060121076327341] |