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.

A143957 An integer >= 2 is included if {the difference between the largest and smallest primes dividing n} divides n+1.

Table of values

n a(n)
1 6
2 12
3 14
4 15
5 18
6 20
7 24
8 35
9 36
10 39
11 44
12 45
13 48
14 50
15 54
16 63
17 72
18 75
19 80
20 84
21 96
22 108
23 119
24 135
25 143
26 144
27 147
28 152
29 153
30 155
31 162
32 175
33 192
34 200
35 208
36 216
37 224
38 225
39 230
40 231
41 242
42 245
43 275
44 279
45 288
46 294
47 299
48 315
49 320
50 323
51 324
52 374
53 375
54 384
55 399
56 405
57 429

List of values

[6, 12, 14, 15, 18, 20, 24, 35, 36, 39, 44, 45, 48, 50, 54, 63, 72, 75, 80, 84, 96, 108, 119, 135, 143, 144, 147, 152, 153, 155, 162, 175, 192, 200, 208, 216, 224, 225, 230, 231, 242, 245, 275, 279, 288, 294, 299, 315, 320, 323, 324, 374, 375, 384, 399, 405, 429]

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

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