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A153129 Numbers n such that 8*n + 5 is not prime. 1
2, 5, 8, 9, 10, 11, 14, 15, 16, 17, 20, 23, 25, 26, 27, 29, 30, 31, 32, 35, 37, 38, 40, 41, 42, 44, 45, 47, 50, 51, 53, 54, 55, 56, 58, 59, 60, 61, 62, 64, 65, 66, 68, 70, 71, 72, 73, 74, 75, 77, 78, 79, 80, 83, 85, 86, 89, 90, 92, 93, 95, 97, 98, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

*;

*, *;

2, *, *;

*, 5, *, *;

*, *, 9, *, *;

*, *, *, 14, *, *;

5, *, *, *, 20, *, *;

*, 10, *, *, *, 27, *, *;

*, *, 16, *, *, *, 35, *, *;

where * marks the non-integer values of (2*n*k + k + n - 2)/4 with n >= k >= 1. - Vincenzo Librandi, Nov 30 2012

MATHEMATICA

Select[Range[200], !PrimeQ[8# + 5] &] (* Vincenzo Librandi, Nov 30 2012 *)

PROG

(MAGMA) [n: n in [1..120] | not IsPrime(8*n + 5)]; // Vincenzo Librandi, Nov 30 2012

CROSSREFS

Cf. A105133.

Sequence in context: A072955 A288730 A276784 * A076871 A070049 A085254

Adjacent sequences:  A153126 A153127 A153128 * A153130 A153131 A153132

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 19 2008

STATUS

approved

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Last modified April 24 22:26 EDT 2019. Contains 322446 sequences. (Running on oeis4.)