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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.

A283107 Numbers k such that tau(4*(k - 1)) is prime.

Table of values

n a(n)
1 2
2 5
3 17
4 257
5 1025
6 16385
7 65537
8 1048577
9 67108865
10 268435457
11 17179869185
12 274877906945
13 1099511627777
14 17592186044417
15 1125899906842625
16 72057594037927937
17 288230376151711745

List of values

[2, 5, 17, 257, 1025, 16385, 65537, 1048577, 67108865, 268435457, 17179869185, 274877906945, 1099511627777, 17592186044417, 1125899906842625, 72057594037927937, 288230376151711745]

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

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