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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.

A343020 a(n) is the smallest prime p such that tau(p+1) = 2^n.

Table of values

n a(n)
1 2
2 5
3 23
4 167
5 839
6 7559
7 128519
8 1081079
9 20540519
10 397837439
11 8031343319
12 188972783999
13 3212537327999
14 125568306863999
15 2888071057871999
16 190487121512687999
17 4381203794791823999
18 215961289494494543999
19 13283916764437951631999
20 540119185025730854543999
21 26465840066260811872655999
22 1356699703068812438127791999

List of values

[2, 5, 23, 167, 839, 7559, 128519, 1081079, 20540519, 397837439, 8031343319, 188972783999, 3212537327999, 125568306863999, 2888071057871999, 190487121512687999, 4381203794791823999, 215961289494494543999, 13283916764437951631999, 540119185025730854543999, 26465840066260811872655999, 1356699703068812438127791999]

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

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