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A153282 Numbers k such that 3*k + 4 is not prime.

%I A153282 #15 Jan 23 2022 20:04:00
%S A153282 0,2,4,6,7,8,10,12,14,15,16,17,18,20,22,24,26,27,28,29,30,32,34,36,37,
%T A153282 38,39,40,42,43,44,46,47,48,50,52,54,55,56,57,58,60,61,62,64,66,67,68,
%U A153282 70,71,72,74,76,77,78,80,81,82,83,84,85,86,87,88,90,92,94,95,96,97,98,99,100
%N A153282 Numbers k such that 3*k + 4 is not prime.
%C A153282 Complement of A034936. - _Omar E. Pol_, Jan 18 2009
%H A153282 Vincenzo Librandi, <a href="/A153282/b153282.txt">Table of n, a(n) for n = 1..1000</a>
%e A153282 Distribution of the odd terms in the following triangular array:
%e A153282 *;
%e A153282 *,7;
%e A153282 *,*,15;
%e A153282 *,*,*,*;
%e A153282 *,17.*,*,39;
%e A153282 *,*,29,*,*,55;
%e A153282 *,*, *,*,*,*, *;
%e A153282 *,27,*,*,61,*,*,95;
%e A153282 *,*,43,*,*,81,*,*,119;
%e A153282 *,*, *,*,*,*, *,*, *, *;
%e A153282 *,37,*,*,83,*,*,129,*,*,175;
%e A153282 *,*,57,*,*,107,*,*,157,*,*,207; etc.
%e A153282 where * marks the non-integer values of (4*h*k + 2*k + 2*h - 3)/3 with h >= k >= 1. - _Vincenzo Librandi_, Jan 17 2013
%t A153282 Select[Range[0, 200], !PrimeQ[3*# + 4]&] (* _Vincenzo Librandi_, Jan 12 2013 *)
%o A153282 (Magma) [n: n in [0..150] | not IsPrime(3*n + 4)]; // _Vincenzo Librandi_, Jan 12 2013
%Y A153282 Cf. A034936.
%K A153282 nonn,easy
%O A153282 1,2
%A A153282 _Vincenzo Librandi_, Dec 23 2008
%E A153282 Edited (and terms confirmed) by _N. J. A. Sloane_, Jan 18 2009