n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 12 |
3 | 41 |
4 | 132 |
5 | 413 |
6 | 1272 |
7 | 3881 |
8 | 11772 |
9 | 35573 |
10 | 107232 |
11 | 322721 |
12 | 970212 |
13 | 2914733 |
14 | 8752392 |
15 | 26273561 |
16 | 78853452 |
17 | 236625893 |
18 | 710008752 |
19 | 2130288401 |
20 | 6391389492 |
21 | 19175217053 |
22 | 57527748312 |
23 | 172587439241 |
24 | 517770706332 |
25 | 1553328896213 |
26 | 4660020243072 |
27 | 13980127838081 |
[0,3,12,41,132,413,1272,3881,11772,35573,107232, 322721,970212,2914733,8752392,26273561,78853452, 236625893,710008752,2130288401,6391389492, 19175217053,57527748312,172587439241,517770706332, 1553328896213,4660020243072,13980127838081] |