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A153144 Numbers n such that 2n+19 is not a prime 2
1, 3, 4, 7, 8, 10, 13, 15, 16, 17, 18, 19, 22, 23, 25, 28, 29, 31, 33, 34, 36, 37, 38, 40, 43, 46, 48, 49, 50, 51, 52, 53, 55, 57, 58, 61, 62, 63, 64, 67, 68, 70, 71, 73, 75, 76, 78, 79, 82, 83, 84, 85, 88, 91, 92, 93, 94, 95, 97, 98, 99, 100, 101 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

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

CROSSREFS

Cf. A153143, A153081, A155551.

Sequence in context: A189521 A138971 A189750 * A032788 A070874 A187582

Adjacent sequences:  A153141 A153142 A153143 * A153145 A153146 A153147

KEYWORD

nonn

AUTHOR

Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 19 2008

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Last modified February 15 13:05 EST 2012. Contains 205789 sequences.