n | a(n) |
---|---|
0 | 0 |
1 | -1 |
2 | 1 |
3 | -3 |
4 | 9 |
5 | -27 |
6 | 81 |
7 | -243 |
8 | 729 |
9 | -2187 |
10 | 6561 |
11 | -19683 |
12 | 59049 |
13 | -177147 |
14 | 531441 |
15 | -1594323 |
16 | 4782969 |
17 | -14348907 |
18 | 43046721 |
19 | -129140163 |
20 | 387420489 |
21 | -1162261467 |
22 | 3486784401 |
23 | -10460353203 |
24 | 31381059609 |
25 | -94143178827 |
26 | 282429536481 |
27 | -847288609443 |
[0,-1,1,-3,9,-27,81,-243,729,-2187,6561,-19683, 59049,-177147,531441,-1594323,4782969,-14348907, 43046721,-129140163,387420489,-1162261467, 3486784401,-10460353203,31381059609,-94143178827, 282429536481,-847288609443] |