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.

A240105 Integers m such that 2*m^k + 1, for k = 2..7, are prime.

Table of values

n a(n)
1 1
2 3490575
3 83972646
4 414180489
5 476072025
6 1881147720
7 3020243916
8 3188924769
9 3285167214
10 3543143220
11 6593858205
12 8239349955
13 10914074124
14 14102235060
15 15455042889
16 16196415300
17 16588528539
18 16636093485
19 17688635511
20 17929182270
21 18997337436
22 19290317670
23 19347263739

List of values

[1, 3490575, 83972646, 414180489, 476072025, 1881147720, 3020243916, 3188924769, 3285167214, 3543143220, 6593858205, 8239349955, 10914074124, 14102235060, 15455042889, 16196415300, 16588528539, 16636093485, 17688635511, 17929182270, 18997337436, 19290317670, 19347263739]

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

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