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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.

A189763 Even numbers n such that solutions to x' = n are not all semiprimes, where x' denotes the arithmetic derivative (A003415).

Table of values

n a(n)
1 12
2 16
3 24
4 32
5 44
6 48
7 56
8 60
9 68
10 72
11 80
12 92
13 96
14 108
15 112
16 120
17 124
18 128
19 140
20 152
21 156
22 162
23 164
24 168
25 176
26 188
27 192
28 212
29 216
30 220
31 236
32 240
33 244
34 248
35 252
36 272
37 284
38 288
39 296
40 316
41 318
42 320
43 324
44 332
45 336
46 350
47 356
48 360
49 368
50 378
51 380
52 384
53 392
54 408

List of values

[12, 16, 24, 32, 44, 48, 56, 60, 68, 72, 80, 92, 96, 108, 112, 120, 124, 128, 140, 152, 156, 162, 164, 168, 176, 188, 192, 212, 216, 220, 236, 240, 244, 248, 252, 272, 284, 288, 296, 316, 318, 320, 324, 332, 336, 350, 356, 360, 368, 378, 380, 384, 392, 408]

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

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