n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 27 |
5 | 81 |
6 | 242 |
7 | 722 |
8 | 2150 |
9 | 6395 |
10 | 19003 |
11 | 56428 |
12 | 167458 |
13 | 496724 |
14 | 1472835 |
15 | 4365692 |
16 | 12936998 |
17 | 38327764 |
18 | 113529027 |
19 | 336221554 |
20 | 995586119 |
21 | 2947641940 |
22 | 8726093434 |
23 | 25829729702 |
24 | 76450357119 |
25 | 226257478851 |
26 | 669566448376 |
27 | 1981320898874 |
28 | 5862583555761 |
[0,1,3,9,27,81,242,722,2150,6395,19003,56428, 167458,496724,1472835,4365692,12936998,38327764, 113529027,336221554,995586119,2947641940, 8726093434,25829729702,76450357119,226257478851, 669566448376,1981320898874,5862583555761] |