n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 10 |
4 | 29 |
5 | 88 |
6 | 268 |
7 | 813 |
8 | 2469 |
9 | 7499 |
10 | 22774 |
11 | 69165 |
12 | 210056 |
13 | 637944 |
14 | 1937449 |
15 | 5884073 |
16 | 17870051 |
17 | 54271714 |
18 | 164824317 |
19 | 500574856 |
20 | 1520256180 |
21 | 4617049429 |
22 | 14022074509 |
23 | 42585329995 |
24 | 129332527054 |
25 | 392785556813 |
26 | 1192897851416 |
[1,1,3,10,29,88,268,813,2469,7499,22774,69165, 210056,637944,1937449,5884073,17870051,54271714, 164824317,500574856,1520256180,4617049429, 14022074509,42585329995,129332527054,392785556813, 1192897851416] |