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.

A134344 Composite numbers such that the arithmetic mean of their prime factors (counted with multiplicity) is prime.

Table of values

n a(n)
1 4
2 8
3 9
4 16
5 20
6 21
7 25
8 27
9 32
10 33
11 44
12 49
13 57
14 60
15 64
16 68
17 69
18 81
19 85
20 93
21 105
22 112
23 116
24 121
25 125
26 128
27 129
28 133
29 145
30 156
31 169
32 177
33 180
34 188
35 195
36 205
37 212
38 213
39 217
40 220
41 231
42 237
43 243
44 249
45 253
46 256
47 265
48 272
49 275
50 289
51 297
52 309
53 332
54 336
55 343
56 356
57 361

List of values

[4, 8, 9, 16, 20, 21, 25, 27, 32, 33, 44, 49, 57, 60, 64, 68, 69, 81, 85, 93, 105, 112, 116, 121, 125, 128, 129, 133, 145, 156, 169, 177, 180, 188, 195, 205, 212, 213, 217, 220, 231, 237, 243, 249, 253, 256, 265, 272, 275, 289, 297, 309, 332, 336, 343, 356, 361]

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

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