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A153219 Numbers n such that 6n+7 is not prime 2
3, 7, 8, 13, 14, 18, 19, 21, 23, 27, 28, 30, 33, 35, 38, 40, 41, 42, 43, 47, 48, 49, 52, 53, 56, 58, 59, 63, 64, 66, 68, 70, 73, 74, 77, 78, 79, 81, 83, 84, 85, 87, 88, 91, 92, 93 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

One less than the associated entry in A046954. - R. J. Mathar, Jan 05 2011

FORMULA

Let p = prime number; n=(p^2-7)/6 mod (p)

CROSSREFS

Cf. A153218

Sequence in context: A031425 A063657 A108575 * A050014 A132017 A010342

Adjacent sequences:  A153216 A153217 A153218 * A153220 A153221 A153222

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 21 2008

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Last modified February 15 23:34 EST 2012. Contains 205860 sequences.