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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.

A117697 Palindromic primes in base 2 (written in base 2).

Table of values

n a(n)
1 11
2 101
3 111
4 10001
5 11111
6 1001001
7 1101011
8 1111111
9 100000001
10 100111001
11 110111011
12 10010101001
13 10110101101
14 11000100011
15 11001010011
16 11011111011
17 11100100111
18 11101010111
19 1001100011001
20 1001111111001
21 1010001000101

List of values

[11, 101, 111, 10001, 11111, 1001001, 1101011, 1111111, 100000001, 100111001, 110111011, 10010101001, 10110101101, 11000100011, 11001010011, 11011111011, 11100100111, 11101010111, 1001100011001, 1001111111001, 1010001000101]

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

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