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A143826 Numbers n such that 6 n^2-1 is prime +0
9
1, 2, 3, 5, 7, 8, 10, 12, 13, 17, 20, 22, 27, 28, 30, 32, 35, 38, 43, 45, 52, 55, 58, 60, 62, 63, 65, 68, 70, 73, 75, 77, 82, 83, 87, 93, 97, 100, 102, 115, 120, 122, 130, 132, 143, 150, 153, 168, 173, 177, 187, 193, 197, 200, 207, 208, 210, 212, 220, 222, 223, 225 (list; graph; listen)
OFFSET

1,2

MATHEMATICA

p = 6; a = {}; Do[k = p x^2 - 1; If[PrimeQ[k], AppendTo[a, x]], {x, 1, 1000}]; a

CROSSREFS

A090686

Sequence in context: A028738 A047222 A028763 this_sequence A001912 A083027 A060107

Adjacent sequences: A143823 A143824 A143825 this_sequence A143827 A143828 A143829

KEYWORD

nonn

AUTHOR

Artur Jasinski (grafix(AT)csl.pl), Sep 02 2008

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.


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