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A153282 Numbers n such that 3*n+4 is not prime. 2
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, 38, 39, 40, 42, 43, 44, 46, 47, 48, 50, 52, 54, 55, 56, 57, 58, 60, 61, 62, 64, 66, 67, 68, 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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Complement of A034936. [From Omar E. Pol, Jan 18 2009]

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

EXAMPLE

Distribution of the odd terms in the following triangular array:

*;

*,7;

*,*,15;

*,*,*,*;

*,17.*,*,39;

*,*,29,*,*,55;

*,*, *,*,*,*, *;

*,27,*,*,61,*,*,95;

*,*,43,*,*,81,*,*,119;

*,*, *,*,*,*, *,*, *, *;

*,37,*,*,83,*,*,129,*,*,175;

*,*,57,*,*,107,*,*,157,*,*,207; etc.

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

MATHEMATICA

Select[Range[0, 200], !PrimeQ[3*# + 4]&] (* Vincenzo Librandi, Jan 12 2013 *)

PROG

(MAGMA) [n: n in [0..150] | not IsPrime(3*n + 4)]; // Vincenzo Librandi, Jan 12 2013

CROSSREFS

Cf. A034936.

Sequence in context: A047237 A285520 A039028 * A014661 A047511 A066507

Adjacent sequences:  A153279 A153280 A153281 * A153283 A153284 A153285

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 23 2008

EXTENSIONS

Edited (and terms confirmed) by N. J. A. Sloane, Jan 18 2009

STATUS

approved

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Last modified June 16 09:27 EDT 2021. Contains 345056 sequences. (Running on oeis4.)