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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A298699 Primes of the form A132583(k)*42 - 43.

Original entry on oeis.org

419, 5039, 51239, 513239, 5133239, 51333239, 5133333333333239, 513333333333333239, 5133333333333333333239, 5133333333333333333333239, 513333333333333333333333239, 513333333333333333333333333333333333333333333333239
Offset: 1

Views

Author

Paolo Galliani, Jan 27 2018

Keywords

Comments

The corresponding values of k are 0, 1, 2, 3, 4, 5, 13, 15, 19, 22, 24, 48, 59, 187, 215, 232. - Bruno Berselli, Jan 29 2018
Further values of k (below 4000): 394, 441, 506, 541, 569, 1456, 2136, 3510. - Daniel Starodubtsev, Jan 05 2020

Examples

			5039 is prime and 5039 = 121*42 - 43, hence it is in the sequence.
51239 is prime and 51239 = 1221*42 - 43, hence it is in the sequence.
513333239 = 12222221*42 - 43 = 61*1747*4817 is not prime, therefore it is not in the sequence.

Crossrefs

Cf. A003020, A132583.

Programs

Extensions

a(8)-a(12) from Bruno Berselli, Jan 29 2018
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