n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 13 |
3 | 55 |
4 | 233 |
5 | 987 |
6 | 4181 |
7 | 17711 |
8 | 75025 |
9 | 317811 |
10 | 1346269 |
11 | 5702887 |
12 | 24157817 |
13 | 102334155 |
14 | 433494437 |
15 | 1836311903 |
16 | 7778742049 |
17 | 32951280099 |
18 | 139583862445 |
19 | 591286729879 |
20 | 2504730781961 |
21 | 10610209857723 |
22 | 44945570212853 |
23 | 190392490709135 |
24 | 806515533049393 |
25 | 3416454622906707 |
[1,3,13,55,233,987,4181,17711,75025,317811, 1346269,5702887,24157817,102334155,433494437, 1836311903,7778742049,32951280099,139583862445, 591286729879,2504730781961,10610209857723, 44945570212853,190392490709135,806515533049393, 3416454622906707] |