n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 23 |
3 | 109 |
4 | 511 |
5 | 2405 |
6 | 11303 |
7 | 53149 |
8 | 249871 |
9 | 1174805 |
10 | 5523383 |
11 | 25968589 |
12 | 122092831 |
13 | 574027205 |
14 | 2698824263 |
15 | 12688690429 |
16 | 59656665391 |
17 | 280479519605 |
18 | 1318691881943 |
19 | 6199911802669 |
20 | 29149270463551 |
21 | 137047105812005 |
[1,5,23,109,511,2405,11303,53149,249871,1174805, 5523383,25968589,122092831,574027205,2698824263, 12688690429,59656665391,280479519605, 1318691881943,6199911802669,29149270463551, 137047105812005] |