n | a(n) |
---|---|
4 | 1 |
5 | 1 |
6 | 5 |
7 | 17 |
8 | 57 |
9 | 193 |
10 | 649 |
11 | 2161 |
12 | 7113 |
13 | 23137 |
14 | 74417 |
15 | 236913 |
16 | 747401 |
17 | 2339137 |
18 | 7270189 |
19 | 22460801 |
20 | 69031105 |
21 | 211206529 |
22 | 643684485 |
23 | 1955082321 |
24 | 5920720729 |
25 | 17884040961 |
26 | 53898818389 |
27 | 162120056257 |
28 | 486791503521 |
29 | 1459448379329 |
[1,1,5,17,57,193,649,2161,7113,23137,74417,236913, 747401,2339137,7270189,22460801,69031105, 211206529,643684485,1955082321,5920720729, 17884040961,53898818389,162120056257,486791503521, 1459448379329] |