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A013607
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a(n) = 6^n-prevprime(6^n).
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5
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1, 5, 5, 5, 17, 7, 17, 7, 7, 7, 59, 19, 17, 13, 7, 19, 49, 13, 19, 7, 23, 35, 19, 89, 17, 119, 29, 55, 5, 19, 5, 59, 85, 5, 17, 35, 59, 83, 49, 115, 19, 23, 43, 109, 103, 7, 23, 19, 7, 245, 43, 13, 5, 55, 89, 83, 143, 53, 53, 383, 7, 55, 113, 37, 5, 23, 143, 115
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OFFSET
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1,2
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LINKS
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FORMULA
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MAPLE
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seq(6^i-prevprime(6^i), i=1..100);
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MATHEMATICA
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pp[n_]:=Module[{n6=6^n}, n6-NextPrime[n6, -1]]; Array[pp, 70] (* Harvey P. Dale, May 04 2011 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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James Kilfiger (mapdn(AT)csv.warwick.ac.uk)
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STATUS
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approved
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