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.

A360475 Smallest prime factor of (2^prime(n) + 1) / 3.

Table of values

n a(n)
2 3
3 11
4 43
5 683
6 2731
7 43691
8 174763
9 2796203
10 59
11 715827883
12 1777
13 83
14 2932031007403
15 283
16 107
17 2833
18 768614336404564651
19 7327657
20 56409643
21 1753
22 201487636602438195784363
23 499
24 179
25 971
26 845100400152152934331135470251
27 415141630193
28 643
29 104124649
30 227

List of values

[3, 11, 43, 683, 2731, 43691, 174763, 2796203, 59, 715827883, 1777, 83, 2932031007403, 283, 107, 2833, 768614336404564651, 7327657, 56409643, 1753, 201487636602438195784363, 499, 179, 971, 845100400152152934331135470251, 415141630193, 643, 104124649, 227]

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

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