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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.

A124993 Primes of the form 22k+1 generated recursively. Initial prime is 23. General term is a(n) = Min {p is prime; p divides (R^11 - 1)/(R - 1); p == 1 (mod 11)}, where Q is the product of previous terms in the sequence and R = 11*Q.

Table of values

n a(n)
1 23
2 4847239
3 2971
4 3936923
5 9461
6 1453
7 331
8 81373909
9 89
10 920771904664817214817542307
11 353
12 401743
13 17088192002665532981
14 11617

List of values

[23, 4847239, 2971, 3936923, 9461, 1453, 331, 81373909, 89, 920771904664817214817542307, 353, 401743, 17088192002665532981, 11617]

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

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