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.

A260641 Numbers n such that 2^n-1 is in A004782 but not in A081767.

Table of values

n a(n)
1 2
2 3
3 7
4 9
5 12
6 13
7 17
8 23
9 25
10 26
11 31
12 33
13 37
14 41
15 44
16 45
17 46
18 48
19 49
20 55
21 56
22 57
23 61
24 65
25 67

List of values

[2, 3, 7, 9, 12, 13, 17, 23, 25, 26, 31, 33, 37, 41, 44, 45, 46, 48, 49, 55, 56, 57, 61, 65, 67]