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A153384 Numbers n such that 24n+1 is not prime +0
2
1, 2, 5, 6, 7, 9, 11, 12, 15, 16, 20, 21, 22, 23, 26, 27, 29, 30, 31, 33, 34, 35, 36, 37, 38, 40, 41, 44, 45, 46, 49, 51, 53, 56, 57, 58, 59, 60, 61, 63, 64, 65, 66, 68, 70, 71, 72, 76, 77, 79, 80, 81, 82, 85, 86, 91, 92, 93, 94, 96, 97, 98, 100, 101, 102 (list; graph; listen)
OFFSET

1,2

FORMULA

Let p = prime number, n=(p^2-1)/24 mod (p)

CROSSREFS

A111174

Sequence in context: A050103 A161539 A047580 this_sequence A102657 A047324 A057894

Adjacent sequences: A153381 A153382 A153383 this_sequence A153385 A153386 A153387

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 25 2008

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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