n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 7 |
3 | 22 |
4 | 63 |
5 | 180 |
6 | 512 |
7 | 1457 |
8 | 4144 |
9 | 11791 |
10 | 33564 |
11 | 95580 |
12 | 272280 |
13 | 775922 |
14 | 2211891 |
15 | 6307338 |
16 | 17991183 |
17 | 51333407 |
18 | 146508751 |
19 | 418260894 |
20 | 1194397553 |
21 | 3411667838 |
22 | 9747639585 |
23 | 27857756981 |
24 | 79635405673 |
25 | 227708537573 |
26 | 651276560978 |
[1,3,7,22,63,180,512,1457,4144,11791,33564,95580, 272280,775922,2211891,6307338,17991183,51333407, 146508751,418260894,1194397553,3411667838, 9747639585,27857756981,79635405673,227708537573, 651276560978] |