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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.

A256789 R(k), the minimal alternating squares representation of k, concatenated for k = 0, 1, 2,....

Table of values

n a(n)
0 0
1 1
2 4
3 -2
4 4
5 -1
6 4
7 9
8 -4
9 9
10 -4
11 1
12 9
13 -4
14 2
15 9
16 -1
17 9
18 16
19 -9
20 4
21 -1
22 16
23 -9
24 4
25 16
26 -4
27 16
28 -4
29 1
30 16
31 -4
32 2
33 16
34 -1
35 16
36 25
37 -9
38 1
39 25
40 -9
41 4
42 -2
43 25
44 -9
45 4
46 -1
47 25
48 -9
49 4
50 25
51 -4
52 25
53 -4
54 1
55 25
56 -4
57 2
58 25
59 -1
60 25
61 36
62 -16
63 9
64 -4
65 1
66 36
67 -9
68 36
69 -9
70 1

List of values

[0, 1, 4, -2, 4, -1, 4, 9, -4, 9, -4, 1, 9, -4, 2, 9, -1, 9, 16, -9, 4, -1, 16, -9, 4, 16, -4, 16, -4, 1, 16, -4, 2, 16, -1, 16, 25, -9, 1, 25, -9, 4, -2, 25, -9, 4, -1, 25, -9, 4, 25, -4, 25, -4, 1, 25, -4, 2, 25, -1, 25, 36, -16, 9, -4, 1, 36, -9, 36, -9, 1]

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