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Search: id:A132830
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| A132830 |
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Numbers of the form 3^n+2 which are not primes. |
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+0
1
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| 245, 731, 2189, 19685, 177149, 531443, 1594325, 43046723, 129140165, 387420491, 1162261469, 3486784403, 10460353205, 31381059611, 94143178829, 847288609445, 7625597484989, 22876792454963, 68630377364885, 205891132094651
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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a = {}; c = 3^x + 2; Do[If[PrimeQ[c], 0, AppendTo[a, c]], {x, 0, 100}]; a (*Artur Jasinski*)
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CROSSREFS
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Cf. A057735, A051783, A132829.
Sequence in context: A013684 A129210 A137521 this_sequence A056264 A023097 A098195
Adjacent sequences: A132827 A132828 A132829 this_sequence A132831 A132832 A132833
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Sep 03 2007
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