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.

A088281 a(1) = 11; for n > 1, palindromic primes in which a single digit is sandwiched between strings of '1's.

Table of values

n a(n)
0 11
1 101
2 131
3 151
4 181
5 191
6 11311
7 11411
8 1114111
9 1117111
10 111181111
11 111191111
12 1111118111111
13 111111151111111
14 111111181111111
15 111111111161111111111
16 11111111111111611111111111111
17 111111111111111111131111111111111111111
18 11111111111111111111111111911111111111111111111111111

List of values

[11, 101, 131, 151, 181, 191, 11311, 11411, 1114111, 1117111, 111181111, 111191111, 1111118111111, 111111151111111, 111111181111111, 111111111161111111111, 11111111111111611111111111111, 111111111111111111131111111111111111111, 11111111111111111111111111911111111111111111111111111]

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

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