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.

A339819 Squarefree numbers k > 1 for which neither 2-adic nor 3-adic valuation of phi(k) exceeds the corresponding valuation of k-1.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 11
6 13
7 17
8 19
9 23
10 29
11 31
12 33
13 37
14 41
15 43
16 47
17 53
18 59
19 61
20 67
21 69
22 71
23 73
24 79
25 83
26 89
27 97
28 101
29 103
30 107
31 109
32 113
33 127
34 131
35 137
36 139
37 141
38 145
39 149
40 151
41 157
42 163
43 167
44 173
45 177
46 179
47 181
48 191
49 193
50 197
51 199
52 211
53 213
54 217
55 223
56 227
57 229
58 233
59 239
60 241
61 249
62 251
63 253
64 257
65 263
66 269
67 271
68 277
69 281
70 283

List of values

[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 33, 37, 41, 43, 47, 53, 59, 61, 67, 69, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 141, 145, 149, 151, 157, 163, 167, 173, 177, 179, 181, 191, 193, 197, 199, 211, 213, 217, 223, 227, 229, 233, 239, 241, 249, 251, 253, 257, 263, 269, 271, 277, 281, 283]