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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.

A125856 a(n) = least number k such that k^(2^n)+1, k^(2^n)+3, k^(2^n)+7 and k^(2^n)+9 are all prime.

Table of values

n a(n)
0 4
1 2
2 83270
3 5241160
4 57171410
5 359829200

List of values

[4, 2, 83270, 5241160, 57171410, 359829200]

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

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