n | a(n) |
---|---|
2 | 1 |
3 | 5 |
4 | 13 |
5 | 33 |
6 | 85 |
7 | 221 |
8 | 581 |
9 | 1545 |
10 | 4149 |
11 | 11237 |
12 | 30657 |
13 | 84169 |
14 | 232361 |
15 | 644573 |
16 | 1795717 |
17 | 5021801 |
18 | 14091829 |
19 | 39665893 |
20 | 111965785 |
21 | 316857945 |
22 | 898797441 |
23 | 2555025821 |
24 | 7277679961 |
25 | 20767821489 |
26 | 59365259065 |
27 | 169967668645 |
28 | 487356812589 |
[1,5,13,33,85,221,581,1545,4149,11237,30657,84169, 232361,644573,1795717,5021801,14091829,39665893, 111965785,316857945,898797441,2555025821, 7277679961,20767821489,59365259065,169967668645, 487356812589] |