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.

A089771 Largest n-digit prime containing no prime substrings, or 0 if no such prime exists.

Table of values

n a(n)
1 7
2 89
3 991
4 9949
5 99469
6 996649
7 9999481
8 99990091
9 999996901
10 9999988049
11 99999981469
12 999999946849
13 9999999946009
14 99999999904081
15 999999999946069
16 9999999999944869
17 99999999999884081
18 999999999999984469
19 9999999999999968869
20 99999999999999900049
21 999999999999999944009
22 9999999999999999999869

List of values

[7, 89, 991, 9949, 99469, 996649, 9999481, 99990091, 999996901, 9999988049, 99999981469, 999999946849, 9999999946009, 99999999904081, 999999999946069, 9999999999944869, 99999999999884081, 999999999999984469, 9999999999999968869, 99999999999999900049, 999999999999999944009, 9999999999999999999869]

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

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