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A162566 Those primes p where (q-p) divides (p+1), where q is the least prime > p. 3

%I #18 Aug 06 2023 17:11:46

%S 2,3,5,7,11,17,19,23,29,41,43,47,53,59,67,71,79,83,101,103,107,127,

%T 131,137,139,149,163,167,173,179,191,197,223,227,233,239,251,257,263,

%U 269,281,293,307,311,347,353,359,379,383,409,419,431,439,443,461,463,467

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

%H Harvey P. Dale, <a href="/A162566/b162566.txt">Table of n, a(n) for n = 1..1000</a>

%e 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.

%t 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 *)

%t Select[Partition[Prime[Range[100]],2,1],Divisible[#[[1]]+1,#[[2]]-#[[1]]]&][[;;,1]] (* _Harvey P. Dale_, Aug 06 2023 *)

%Y Cf. A162565.

%K nonn

%O 1,1

%A _Leroy Quet_, Jul 06 2009

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

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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)