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.

A162566 Those primes p where (q-p) divides (p+1), where q is the least prime > p.

Original entry on oeis.org

2, 3, 5, 7, 11, 17, 19, 23, 29, 41, 43, 47, 53, 59, 67, 71, 79, 83, 101, 103, 107, 127, 131, 137, 139, 149, 163, 167, 173, 179, 191, 197, 223, 227, 233, 239, 251, 257, 263, 269, 281, 293, 307, 311, 347, 353, 359, 379, 383, 409, 419, 431, 439, 443, 461, 463, 467
Offset: 1

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Author

Leroy Quet, Jul 06 2009

Keywords

Examples

			The 17th prime is 59 and the 18th prime is 61. (61-59) = 2, and 2 divides 59+1 = 60. So 59 is in the sequence.
		

Crossrefs

Cf. A162565.

Programs

  • Mathematica
    For[n = 1, n <= 1000, n++, If[Mod[Prime[n] + 1, Prime[n + 1] - Prime[n]] == 0, Print[Prime[n]]]] (* Jasper Mulder (jasper.mulder(AT)planet.nl), Jul 15 2009 *)
    Select[Partition[Prime[Range[100]],2,1],Divisible[#[[1]]+1,#[[2]]-#[[1]]]&][[;;,1]] (* Harvey P. Dale, Aug 06 2023 *)

Extensions

More terms from Jasper Mulder (jasper.mulder(AT)planet.nl), Jul 15 2009