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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.

A339456 a(n) is the Y-coordinate of the n-th point of the space filling curve H defined in Comments section; A339455 gives X-coordinates.

Table of values

n a(n)
0 0
1 0
2 1
3 1
4 0
5 -1
6 -1
7 0
8 0
9 1
10 2
11 2
12 3
13 3
14 2
15 1
16 1
17 2
18 2
19 1
20 0
21 -1
22 -2
23 -2
24 -1
25 -1
26 -2
27 -3
28 -3
29 -2
30 -2
31 -1
32 0
33 0
34 1
35 1
36 0
37 -1
38 -1
39 0
40 0
41 1
42 2
43 3
44 4
45 4
46 5
47 5
48 4
49 3
50 3
51 4
52 4
53 5
54 6
55 6
56 7
57 7
58 6
59 5
60 5
61 6
62 6
63 5
64 4
65 3
66 2
67 2
68 3
69 3
70 2
71 1
72 1
73 2
74 2
75 3
76 4
77 4
78 5
79 5
80 4
81 3

List of values

[0, 0, 1, 1, 0, -1, -1, 0, 0, 1, 2, 2, 3, 3, 2, 1, 1, 2, 2, 1, 0, -1, -2, -2, -1, -1, -2, -3, -3, -2, -2, -1, 0, 0, 1, 1, 0, -1, -1, 0, 0, 1, 2, 3, 4, 4, 5, 5, 4, 3, 3, 4, 4, 5, 6, 6, 7, 7, 6, 5, 5, 6, 6, 5, 4, 3, 2, 2, 3, 3, 2, 1, 1, 2, 2, 3, 4, 4, 5, 5, 4, 3]

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