n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 2 |
6 | -3 |
7 | 5 |
8 | 7 |
9 | -9 |
10 | 12 |
11 | 15 |
12 | -18 |
13 | 22 |
14 | 26 |
15 | -30 |
16 | 35 |
17 | 40 |
18 | -45 |
19 | 51 |
20 | 57 |
21 | -63 |
22 | 70 |
23 | 77 |
24 | -84 |
25 | 92 |
26 | 100 |
27 | -108 |
28 | 117 |
29 | 126 |
30 | -135 |
31 | 145 |
32 | 155 |
33 | -165 |
34 | 176 |
35 | 187 |
36 | -198 |
37 | 210 |
38 | 222 |
39 | -234 |
40 | 247 |
41 | 260 |
42 | -273 |
43 | 287 |
44 | 301 |
45 | -315 |
46 | 330 |
47 | 345 |
48 | -360 |
49 | 376 |
50 | 392 |
51 | -408 |
52 | 425 |
53 | 442 |
54 | -459 |
55 | 477 |
[0,0,0,0,1,2,-3,5,7,-9,12,15,-18,22,26,-30,35,40, -45,51,57,-63,70,77,-84,92,100,-108,117,126,-135, 145,155,-165,176,187,-198,210,222,-234,247,260, -273,287,301,-315,330,345,-360,376,392,-408,425, 442,-459,477] |