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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.

A309789 Numbers n such that -1 + Sum_{k=1..n} prime(k)! is prime, where prime(k) is the k-th prime.

Table of values

n	a(n)
1	2
2	3
3	4
4	20
5	25

List of values

[2, 3, 4, 20, 25]

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

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