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A232010 Numbers k such that p^2 + k is composite for all prime p. 3

%I #17 Dec 20 2021 02:37:41

%S 5,11,17,21,23,26,29,31,35,41,45,47,51,53,56,59,61,65,68,71,73,77,81,

%T 83,86,87,89,91,95,101,107,110,111,113,115,116,117,119,121,125,129,

%U 131,134,137,139,141,143,146,149,151,152,155,157,161,165,167,171,173,176

%N Numbers k such that p^2 + k is composite for all prime p.

%C Primes from this sequence are in A067775.

%C Complement of A232012.

%F A232009(a(n)) = 0.

%e 7 is not in the sequence because 2^2 + 7 = 11 (prime).

%Y Cf. A232009, A067775, A232012, A023200.

%K nonn

%O 1,1

%A _Jaroslav Krizek_, Nov 20 2013

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Last modified September 3 12:40 EDT 2024. Contains 375670 sequences. (Running on oeis4.)