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.

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A238011 Numbers k such that (2k)! - k! - 1 is prime.

Original entry on oeis.org

5, 7, 8, 15, 103, 179, 473, 2054, 3595, 4039
Offset: 1

Views

Author

Rick L. Shepherd, Feb 16 2014

Keywords

Comments

No more terms up to 5000. The first six terms are as previously stated in A118813. All terms found and primes proved by OpenPFGW.
No more terms up to 10000. - Michael S. Branicky, Dec 23 2024

Examples

			5 is a term because (2*5)! - 5! - 1 = 3628679 is prime.
4039 is a term because (2*4039)! - 4039! - 1 is prime (28058 digits).

Links

Crossrefs

Cf. A118813 (corresponding primes), A237443, A118812.
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