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.

A137907 Least k such that k*(2^p-1)*(k*(2^p-1)-1)+1 is prime, where 2^p-1 runs through the Mersenne primes.

Table of values

n a(n)
1 1
2 1
3 9
4 6
5 9
6 24
7 4
8 7
9 28
10 70
11 73
12 121
13 511
14 106
15 343
16 2169
17 1423
18 2146
19 5736
20 4444
21 2484
22 2310
23 2679
24 25623
25 2481
26 39213

List of values

[1, 1, 9, 6, 9, 24, 4, 7, 28, 70, 73, 121, 511, 106, 343, 2169, 1423, 2146, 5736, 4444, 2484, 2310, 2679, 25623, 2481, 39213]