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.

A134617 Numbers such that the arithmetic mean of the squares of their prime factors (taken with multiplicity) is a prime.

Table of values

n a(n)
1 15
2 20
3 21
4 28
5 35
6 39
7 44
8 48
9 51
10 52
11 55
12 65
13 69
14 85
15 91
16 92
17 95
18 108
19 112
20 115
21 116
22 129
23 135
24 141
25 145
26 159
27 164
28 172
29 188
30 189
31 205
32 208
33 209
34 215
35 221
36 225
37 235
38 236
39 245
40 249
41 259
42 268
43 272
44 295
45 297
46 299
47 305
48 309
49 315
50 316
51 320
52 325
53 329
54 339
55 341
56 365

List of values

[15, 20, 21, 28, 35, 39, 44, 48, 51, 52, 55, 65, 69, 85, 91, 92, 95, 108, 112, 115, 116, 129, 135, 141, 145, 159, 164, 172, 188, 189, 205, 208, 209, 215, 221, 225, 235, 236, 245, 249, 259, 268, 272, 295, 297, 299, 305, 309, 315, 316, 320, 325, 329, 339, 341, 365]

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

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