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.

A255349 Numbers n such that n(n+1) is divisible by some m(m+1) with none of {n, n+1} divisible by any of {m, m+1}.

Table of values

n a(n)
1 20
2 35
3 77
4 84
5 98
6 99
7 104
8 119
9 132
10 153
11 174
12 175
13 186
14 189
15 195
16 216
17 224
18 230
19 231
20 245
21 246
22 260
23 272
24 279
25 285
26 350
27 351
28 363
29 374
30 384
31 399
32 425
33 429
34 440
35 455
36 459
37 494
38 527
39 539
40 551
41 560
42 575
43 594
44 608
45 609
46 615
47 620
48 644
49 645
50 650
51 665
52 696
53 714
54 730
55 735
56 759
57 779
58 780

List of values

[20, 35, 77, 84, 98, 99, 104, 119, 132, 153, 174, 175, 186, 189, 195, 216, 224, 230, 231, 245, 246, 260, 272, 279, 285, 350, 351, 363, 374, 384, 399, 425, 429, 440, 455, 459, 494, 527, 539, 551, 560, 575, 594, 608, 609, 615, 620, 644, 645, 650, 665, 696, 714, 730, 735, 759, 779, 780]

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

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