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.

A077361 Smallest n-digit prime whose external digits as well as internal digits form a prime, or 0 if no such number exists.

Table of values

n a(n)
0 0
1 0
2 127
3 1021
4 10037
5 100057
6 1000033
7 10000079
8 100000037
9 1000000021
10 10000000033
11 100000000057
12 1000000000039
13 10000000000037
14 100000000000031
15 1000000000000037
16 10000000000000079
17 100000000000000021

List of values

[0, 0, 127, 1021, 10037, 100057, 1000033, 10000079, 100000037, 1000000021, 10000000033, 100000000057, 1000000000039, 10000000000037, 100000000000031, 1000000000000037, 10000000000000079, 100000000000000021]

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

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