cp's OEIS Frontend

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.

A124097 Numbers which are "easy" to key on a standard telephone keypad.

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 4
6 5
7 6
8 7
9 8
10 9
11 11
12 12
13 14
14 15
15 21
16 22
17 23
18 24
19 25
20 26
21 32
22 33
23 35
24 36
25 41
26 42
27 44
28 45
29 47
30 48
31 51
32 52
33 53
34 54
35 55
36 56
37 57
38 58
39 59
40 62
41 63
42 65
43 66
44 68
45 69
46 70
47 74
48 75
49 77
50 78
51 80
52 84
53 85
54 86
55 87
56 88
57 89
58 90
59 95
60 96
61 98
62 99
63 111
64 112
65 114
66 115
67 121
68 122
69 123
70 124

List of values

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 14, 15, 21, 22, 23, 24, 25, 26, 32, 33, 35, 36, 41, 42, 44, 45, 47, 48, 51, 52, 53, 54, 55, 56, 57, 58, 59, 62, 63, 65, 66, 68, 69, 70, 74, 75, 77, 78, 80, 84, 85, 86, 87, 88, 89, 90, 95, 96, 98, 99, 111, 112, 114, 115, 121, 122, 123, 124]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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