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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.

A378143 a(n) is the smallest prime of the form (2*p)^(2^n) + 1 for some prime p.

Table of values

n a(n)
0 5
1 17
2 257
3 65537
4 808551180810136214718004658177
5 9807585394417153072393128067370344132933540474708183331242417216238928121991128579833857

List of values

[5, 17, 257, 65537, 808551180810136214718004658177, 9807585394417153072393128067370344132933540474708183331242417216238928121991128579833857]

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

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