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A132829 Numbers n such that 3^n+2 is not prime. +0
2
5, 6, 7, 9, 11, 12, 13, 16, 17, 18, 19, 20, 21, 22, 23, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

a = {}; c = 3^x + 2; Do[If[PrimeQ[c], 0, AppendTo[a, x]], {x, 0, 100}]; a (*Artur Jasinski*)

CROSSREFS

Cf. A057735, A051783.

Sequence in context: A081407 A066263 A089192 this_sequence A096820 A030388 A031059

Adjacent sequences: A132826 A132827 A132828 this_sequence A132830 A132831 A132832

KEYWORD

nonn

AUTHOR

Artur Jasinski (grafix(AT)csl.pl), Sep 03 2007

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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