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A153264 Numbers n such that 16*n+15 is not prime. 1
0, 3, 5, 6, 8, 9, 10, 12, 15, 17, 18, 19, 20, 21, 24, 25, 27, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 41, 42, 43, 45, 47, 48, 49, 50, 51, 52, 54, 55, 57, 58, 59, 60, 62, 63, 65, 66, 69, 70, 72, 73, 74, 75, 77, 78, 80, 81, 83, 84, 85, 86, 87, 90, 93, 94, 95, 96, 99 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

EXAMPLE

Distribution of the terms in the following triangular array:

*;

0,*;

*,*,*;

*,*,3,*;

*,*,*,*,*;

*,*,*,*,8,*;

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

*,*,*,*,*,*,15,*;

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

3,*,*,*,*,*,*,*,24,*;

*,*,*,12,*,*,*,*,*,*,*;

*,*,10,*,*,*,*,*,*,*,35,*; etc.

where * marks the non-integer values of (2*h*k + k + h - 7)/8 with h >= k >= 1. - Vincenzo Librandi, Jan 15 2013

MATHEMATICA

Select[Range[0, 200], !PrimeQ[16 # + 15] &] (* Vincenzo Librandi, Jan 12 2013 *)

PROG

(MAGMA) [n: n in [0..150] | not IsPrime(16*n+15)]; // Vincenzo Librandi, Jan 12 2013

CROSSREFS

Cf. A127575.

Sequence in context: A165290 A026430 A002150 * A249595 A133561 A095117

Adjacent sequences:  A153261 A153262 A153263 * A153265 A153266 A153267

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 22 2008

EXTENSIONS

0 added by Arkadiusz Wesolowski, Aug 03 2011

STATUS

approved

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Last modified February 19 07:51 EST 2019. Contains 320309 sequences. (Running on oeis4.)