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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A344300 Expansion of Sum_{k>=1} (-1)^(k+1) * k^2 * x^(k^2) / (1 - x^(k^2)).

Table of values

n a(n)
1 1
2 1
3 1
4 -3
5 1
6 1
7 1
8 -3
9 10
10 1
11 1
12 -3
13 1
14 1
15 1
16 -19
17 1
18 10
19 1
20 -3
21 1
22 1
23 1
24 -3
25 26
26 1
27 10
28 -3
29 1
30 1
31 1
32 -19
33 1
34 1
35 1
36 -30
37 1
38 1
39 1
40 -3
41 1
42 1
43 1
44 -3
45 10
46 1
47 1
48 -19
49 50
50 26
51 1
52 -3
53 1
54 10
55 1
56 -3
57 1
58 1
59 1
60 -3
61 1
62 1
63 10
64 -83
65 1
66 1
67 1
68 -3
69 1
70 1
71 1
72 -30
73 1
74 1
75 26
76 -3
77 1
78 1
79 1
80 -19

List of values

[1, 1, 1, -3, 1, 1, 1, -3, 10, 1, 1, -3, 1, 1, 1, -19, 1, 10, 1, -3, 1, 1, 1, -3, 26, 1, 10, -3, 1, 1, 1, -19, 1, 1, 1, -30, 1, 1, 1, -3, 1, 1, 1, -3, 10, 1, 1, -19, 50, 26, 1, -3, 1, 10, 1, -3, 1, 1, 1, -3, 1, 1, 10, -83, 1, 1, 1, -3, 1, 1, 1, -30, 1, 1, 26, -3, 1, 1, 1, -19]