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.

A109905 a(n) = greatest prime of the form k*(n-k) +1. 0 if no such prime exists.

Table of values

n a(n)
1 0
2 2
3 3
4 5
5 7
6 0
7 13
8 17
9 19
10 17
11 31
12 37
13 43
14 41
15 37
16 61
17 73
18 73
19 89
20 101
21 109
22 113
23 131
24 109
25 157
26 89
27 181
28 197
29 211
30 0
31 241
32 257
33 271
34 281
35 307
36 181
37 337
38 353
39 379
40 401
41 421
42 433
43 463
44 449
45 487
46 521
47 547
48 577
49 601
50 617
51 631
52 677
53 701
54 0
55 757
56 769
57 811
58 761
59 859
60 757

List of values

[0, 2, 3, 5, 7, 0, 13, 17, 19, 17, 31, 37, 43, 41, 37, 61, 73, 73, 89, 101, 109, 113, 131, 109, 157, 89, 181, 197, 211, 0, 241, 257, 271, 281, 307, 181, 337, 353, 379, 401, 421, 433, 463, 449, 487, 521, 547, 577, 601, 617, 631, 677, 701, 0, 757, 769, 811, 761, 859, 757]

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

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