cp's OEIS Frontend

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.

A358342 Lesser of twin primes p such that sigma((p-1)/2) + tau((p-1)/2) is a prime.

Table of values

n a(n)
1 3
2 5
3 17
4 65537
5 1927561217
6 6015902625062501
7 12370388895062501
8 835920078368222501
9 6448645485213008897
10 50973659693056000001
11 54332889713542767617
12 64304984013657011717
13 112112769248058062501
14 147337258721536000001

List of values

[3, 5, 17, 65537, 1927561217, 6015902625062501, 12370388895062501, 835920078368222501, 6448645485213008897, 50973659693056000001, 54332889713542767617, 64304984013657011717, 112112769248058062501, 147337258721536000001]

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

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