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.

A124387 Largest prime < 2*a(n-1) written in binary, a(1)=2.

Table of values

n a(n)
1 10
2 11
3 101
4 111
5 1101
6 10111
7 101011
8 1010011
9 10100011
10 100111101
11 1001110111
12 10011101011
13 100111000111
14 1001110001011
15 10011011110101
16 100110111100001
17 1001101110111101
18 10011011101010011
19 100110111010011101
20 1001101110100011111
21 10011011101000111011

List of values

[10, 11, 101, 111, 1101, 10111, 101011, 1010011, 10100011, 100111101, 1001110111, 10011101011, 100111000111, 1001110001011, 10011011110101, 100110111100001, 1001101110111101, 10011011101010011, 100110111010011101, 1001101110100011111, 10011011101000111011]

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

Content is available under The OEIS End-User License Agreement.