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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.

A082043 Square array, A(n, k) = (k*n)^2 + 2*k*n + 1, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 4
5 1
6 1
7 9
8 9
9 1
10 1
11 16
12 25
13 16
14 1
15 1
16 25
17 49
18 49
19 25
20 1
21 1
22 36
23 81
24 100
25 81
26 36
27 1
28 1
29 49
30 121
31 169
32 169
33 121
34 49
35 1
36 1
37 64
38 169
39 256
40 289
41 256
42 169
43 64
44 1
45 1
46 81
47 225
48 361
49 441
50 441
51 361
52 225
53 81
54 1
55 1
56 100
57 289
58 484
59 625
60 676
61 625
62 484
63 289
64 100
65 1

List of values

[1, 1, 1, 1, 4, 1, 1, 9, 9, 1, 1, 16, 25, 16, 1, 1, 25, 49, 49, 25, 1, 1, 36, 81, 100, 81, 36, 1, 1, 49, 121, 169, 169, 121, 49, 1, 1, 64, 169, 256, 289, 256, 169, 64, 1, 1, 81, 225, 361, 441, 441, 361, 225, 81, 1, 1, 100, 289, 484, 625, 676, 625, 484, 289, 100, 1]