cp's OEIS Frontend

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.

A287325 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of Sum_{j=-inf..inf} (-1)^j*x^(k*j*(j-1)/2 + j^2).

Table of values

n a(n)
0 1
1 1
2 -2
3 1
4 -1
5 0
6 1
7 -1
8 -1
9 0
10 1
11 -1
12 0
13 0
14 2
15 1
16 -1
17 0
18 -1
19 0
20 0
21 1
22 -1
23 0
24 0
25 0
26 1
27 0
28 1
29 -1
30 0
31 0
32 -1
33 0
34 0
35 0
36 1
37 -1
38 0
39 0
40 0
41 0
42 1
43 1
44 0
45 1
46 -1
47 0
48 0
49 0
50 -1
51 0
52 0
53 0
54 -2
55 1
56 -1
57 0
58 0
59 0
60 0
61 0
62 1
63 0
64 0
65 0
66 1
67 -1
68 0
69 0
70 0
71 0
72 -1
73 0
74 0
75 0
76 0
77 0
78 1
79 -1
80 0
81 0
82 0
83 0
84 0
85 0
86 1
87 0
88 1
89 0
90 0
91 1
92 -1
93 0
94 0
95 0
96 0
97 0
98 -1
99 0
100 0
101 0
102 0
103 -1
104 0

List of values

[1, 1, -2, 1, -1, 0, 1, -1, -1, 0, 1, -1, 0, 0, 2, 1, -1, 0, -1, 0, 0, 1, -1, 0, 0, 0, 1, 0, 1, -1, 0, 0, -1, 0, 0, 0, 1, -1, 0, 0, 0, 0, 1, 1, 0, 1, -1, 0, 0, 0, -1, 0, 0, 0, -2, 1, -1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, -1, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0]