n | a(n) |
---|---|
1 | 3 |
2 | -9 |
3 | 6 |
4 | 36 |
5 | 150 |
6 | 540 |
7 | 1806 |
8 | 5796 |
9 | 18150 |
10 | 55980 |
11 | 171006 |
12 | 519156 |
13 | 1569750 |
14 | 4733820 |
15 | 14250606 |
16 | 42850116 |
17 | 128746950 |
18 | 386634060 |
19 | 1160688606 |
20 | 3483638676 |
21 | 10454061750 |
22 | 31368476700 |
23 | 94118013006 |
24 | 282379204836 |
25 | 847187946150 |
26 | 2541664501740 |
27 | 7625194831806 |
[3,-9,6,36,150,540,1806,5796,18150,55980,171006, 519156,1569750,4733820,14250606,42850116, 128746950,386634060,1160688606,3483638676, 10454061750,31368476700,94118013006,282379204836, 847187946150,2541664501740,7625194831806] |