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A039641
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Fixed point of "k -> k/2 or (k+1)/2 until result is prime", starting with prime(n)+1.
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4
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3, 2, 3, 2, 3, 7, 5, 5, 3, 2, 2, 19, 11, 11, 3, 7, 2, 31, 17, 5, 37, 5, 11, 23, 13, 13, 13, 7, 7, 29, 2, 17, 5, 5, 19, 19, 79, 41, 11, 11, 23, 23, 3, 97, 13, 13, 53, 7, 29, 29, 59, 2, 61, 2, 17, 17, 17, 17, 139, 71, 71, 37, 5, 5, 157, 5, 83, 43, 11, 11, 89, 23, 23, 47, 3, 3, 13
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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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Table[NestWhile[If[EvenQ[#], #/2, (#+1)/2]&, n+1, !PrimeQ[#]&], {n, Prime[ Range[ 80]]}] (* Harvey P. Dale, May 12 2014 *)
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PROG
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(Haskell)
a039641 = until ((== 1) . a010051) (flip div 2 . (+ 1)) . (+ 1) . a000040
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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