n | a(n) |
---|---|
1 | 3 |
2 | 6 |
3 | 18 |
4 | 45 |
5 | 141 |
6 | 386 |
7 | 1191 |
8 | 3402 |
9 | 10446 |
10 | 30294 |
11 | 92577 |
12 | 270999 |
13 | 825300 |
14 | 2429282 |
15 | 7379169 |
16 | 21802419 |
17 | 66100641 |
18 | 195819283 |
19 | 592809345 |
20 | 1759625625 |
21 | 5320769349 |
22 | 15817342094 |
23 | 47783816163 |
24 | 142217596131 |
25 | 429306813420 |
26 | 1278945212410 |
[3,6,18,45,141,386,1191,3402,10446,30294,92577, 270999,825300,2429282,7379169,21802419,66100641, 195819283,592809345,1759625625,5320769349, 15817342094,47783816163,142217596131,429306813420, 1278945212410] |