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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.

A316479 a(n) is the smallest prime whose base-b expansion, read as a base-10 number, is a prime for every b in 2, 3, ..., n. (For n > 10, each base-b expansion for 10 < b <= n must contain no digit larger than 9.)

Table of values

n a(n)
2 3
3 157
4 157
5 9241
6 9241
7 48404791
8 18172964503
9 50006393431
10 50006393431
11 181395559296673

List of values

[3, 157, 157, 9241, 9241, 48404791, 18172964503, 50006393431, 50006393431, 181395559296673]

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

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