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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.

A369378 a(n) is the smallest k such that 2^(2^n+1)-1 + 2^k is prime, or -1 if no such k exists.

Table of values

n	a(n)
0	1
1	2
2	4
3	16
4	1968
5	64
6	64

List of values

[1, 2, 4, 16, 1968, 64, 64]

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

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