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A153464 Numbers n such that 4n+9 is not prime +0
1
3, 4, 6, 9, 10, 12, 14, 15, 17, 18, 19, 21, 24, 27, 28, 29, 30, 31, 33, 34, 36, 38, 39, 40, 42, 44, 45, 48, 49, 50, 51, 52, 53, 54, 57, 59, 60, 61, 63, 64, 66, 69, 70, 72, 73, 74, 75, 78, 79, 80, 81, 83, 84, 87, 88, 89, 90, 92, 93, 94, 96, 99, 101, 102, 104, 105, 107, 108, 109 (list; graph; listen)
OFFSET

1,1

FORMULA

Let p = prime number, n= (p^2-9)/4 mod (p)

CROSSREFS

A111199

Sequence in context: A080336 A082692 A032706 this_sequence A047231 A050131 A089986

Adjacent sequences: A153461 A153462 A153463 this_sequence A153465 A153466 A153467

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 27 2008

EXTENSIONS

79 added by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 23 2009

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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