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.

A087305 Smallest n-digit non-palindromic number such that it and its digit reversal have the same prime signature.

Table of values

n a(n)
2 13
3 107
4 1002
5 10002
6 100006
7 1000007
8 10000013
9 100000005
10 1000000007
11 10000000006
12 100000000007
13 1000000000006
14 10000000000003
15 100000000000002
16 1000000000000003
17 10000000000000002
18 100000000000000005
19 1000000000000000005
20 10000000000000000021
21 100000000000000000031

List of values

[13, 107, 1002, 10002, 100006, 1000007, 10000013, 100000005, 1000000007, 10000000006, 100000000007, 1000000000006, 10000000000003, 100000000000002, 1000000000000003, 10000000000000002, 100000000000000005, 1000000000000000005, 10000000000000000021, 100000000000000000031]

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

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