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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.

A316823 Balanced nonary enumeration (or balanced nonary representation) of integers; write n in nonary (base 9) and then replace 5's with (-4)'s, 6's with (-3)'s, 7's with (-2)'s, and 8's with (-1)'s.

Table of values

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

List of values

[0, 1, 2, 3, 4, -4, -3, -2, -1, 9, 10, 11, 12, 13, 5, 6, 7, 8, 18, 19, 20, 21, 22, 14, 15, 16, 17, 27, 28, 29, 30, 31, 23, 24, 25, 26, 36, 37, 38, 39, 40, 32, 33, 34, 35, -36, -35, -34, -33, -32, -40, -39, -38, -37, -27, -26, -25, -24, -23, -31, -30, -29, -28]

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