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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.

A260989 Integers n such that prime(n-1) + prime(n+1) is a multiple of n.

Table of values

n a(n)
1 4
2 5
3 8
4 11
5 12
6 18
7 20
8 70
9 72
10 1053
11 4116
12 6459
13 6460
14 40083
15 63328
16 251742
17 399924
18 637320
19 637322
20 637330
21 2582288
22 2582436
23 2582488
24 10553828
25 16899042
26 69709721
27 179992913
28 179992922
29 465769813
30 749973302
31 749973314
32 1208198617
33 1208198629

List of values

[4, 5, 8, 11, 12, 18, 20, 70, 72, 1053, 4116, 6459, 6460, 40083, 63328, 251742, 399924, 637320, 637322, 637330, 2582288, 2582436, 2582488, 10553828, 16899042, 69709721, 179992913, 179992922, 465769813, 749973302, 749973314, 1208198617, 1208198629]

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

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