n | a(n) |
---|---|
1 | 3 |
2 | 4 |
3 | 16 |
4 | 61 |
5 | 186 |
6 | 977 |
7 | 3875 |
8 | 15976 |
9 | 69695 |
10 | 291860 |
11 | 1231606 |
12 | 5238686 |
13 | 22132400 |
14 | 93661059 |
15 | 396772953 |
16 | 1679005708 |
17 | 7107319506 |
18 | 30089549251 |
19 | 127365200852 |
20 | 539154160924 |
21 | 2282345606777 |
22 | 9661359675255 |
23 | 40897805890885 |
24 | 173126011417215 |
[3,4,16,61,186,977,3875,15976,69695,291860, 1231606,5238686,22132400,93661059,396772953, 1679005708,7107319506,30089549251,127365200852, 539154160924,2282345606777,9661359675255, 40897805890885,173126011417215] |