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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.

A097987 Numbers k such that 4 does not divide phi(k), where phi is Euler's totient function (A000010).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 6
6 7
7 9
8 11
9 14
10 18
11 19
12 22
13 23
14 27
15 31
16 38
17 43
18 46
19 47
20 49
21 54
22 59
23 62
24 67
25 71
26 79
27 81
28 83
29 86
30 94
31 98
32 103
33 107
34 118
35 121
36 127
37 131
38 134
39 139
40 142
41 151
42 158
43 162
44 163
45 166
46 167
47 179
48 191
49 199
50 206
51 211
52 214
53 223
54 227
55 239
56 242
57 243
58 251
59 254
60 262
61 263
62 271

List of values

[1, 2, 3, 4, 6, 7, 9, 11, 14, 18, 19, 22, 23, 27, 31, 38, 43, 46, 47, 49, 54, 59, 62, 67, 71, 79, 81, 83, 86, 94, 98, 103, 107, 118, 121, 127, 131, 134, 139, 142, 151, 158, 162, 163, 166, 167, 179, 191, 199, 206, 211, 214, 223, 227, 239, 242, 243, 251, 254, 262, 263, 271]

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

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