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A065540
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a(n) is smallest prime > 3*a(n-1), a(1) = 3.
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0
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3, 11, 37, 113, 347, 1049, 3163, 9491, 28477, 85439, 256337, 769019, 2307059, 6921179, 20763541, 62290633, 186871907, 560615723, 1681847191, 5045541577, 15136624739, 45409874221, 136229622677, 408688868051, 1226066604179
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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NextPrim[n_Integer] := Block[ {k = n + 1}, While[ !PrimeQ[k], k++ ]; Return[k]]; a[1] = 3; a[n_] := NextPrim[ 3*a[n - 1]]; Table[ a[n], {n, 1, 30} ]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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