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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.

A309995 Balanced septenary enumeration (or balanced septenary representation) of integers; write n in septenary and then replace 4's with (-3),s, 5's with (-2)'s, and 6's with (-1)'s.

Table of values

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

List of values

[0, 1, 2, 3, -3, -2, -1, 7, 8, 9, 10, 4, 5, 6, 14, 15, 16, 17, 11, 12, 13, 21, 22, 23, 24, 18, 19, 20, -21, -20, -19, -18, -24, -23, -22, -14, -13, -12, -11, -17, -16, -15, -7, -6, -5, -4, -10, -9, -8, 49, 50, 51, 52, 46, 47, 48, 56, 57, 58, 59, 53, 54, 55, 63]

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