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.

A139426 Smallest number k such that M(n)^2+k*M(n)-1 is prime with M(n)= Mersenne primes =A000668(n).

Table of values

n a(n)
1 1
2 5
3 1
4 5
5 11
6 11
7 17
8 19
9 23
10 97
11 127
12 145
13 167
14 269
15 767
16 479
17 3307
18 1453
19 18007
20 2357
21 599
22 17669
23 5527
24 3191
25 3251
26 70249
27 147773
28 39637

List of values

[1, 5, 1, 5, 11, 11, 17, 19, 23, 97, 127, 145, 167, 269, 767, 479, 3307, 1453, 18007, 2357, 599, 17669, 5527, 3191, 3251, 70249, 147773, 39637]