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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.

A284406 Odd numbers k such that lambda(k) < phi(k) and gcd(lambda(k), k-1) = gcd(phi(k), k-1).

Table of values

n a(n)
1 15
2 35
3 39
4 45
5 51
6 55
7 63
8 75
9 85
10 87
11 95
12 99
13 111
14 115
15 117
16 119
17 123
18 135
19 143
20 147
21 153
22 155
23 159
24 165
25 171
26 175
27 183
28 187
29 195
30 203
31 205
32 207
33 215
34 219
35 221
36 231
37 235
38 245
39 247
40 255
41 259
42 261
43 267
44 275
45 279
46 285
47 287
48 291
49 295
50 299
51 303
52 315
53 319
54 323
55 325
56 327
57 333
58 335
59 339
60 351

List of values

[15, 35, 39, 45, 51, 55, 63, 75, 85, 87, 95, 99, 111, 115, 117, 119, 123, 135, 143, 147, 153, 155, 159, 165, 171, 175, 183, 187, 195, 203, 205, 207, 215, 219, 221, 231, 235, 245, 247, 255, 259, 261, 267, 275, 279, 285, 287, 291, 295, 299, 303, 315, 319, 323, 325, 327, 333, 335, 339, 351]

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

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