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A161003
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A list of the composite numbers divided by their largest prime factors.
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1
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2, 2, 4, 3, 2, 4, 2, 3, 8, 6, 4, 3, 2, 8, 5, 2, 9, 4, 6, 16, 3, 2, 5, 12, 2, 3, 8, 6, 4, 9, 2, 16, 7, 10, 3, 4, 18, 5, 8, 3, 2, 12, 2, 9, 32, 5, 6, 4, 3, 10, 24, 2, 15, 4, 7, 6, 16, 27, 2, 12, 5, 2, 3, 8, 18, 7, 4, 3, 2, 5, 32, 14, 9, 20, 6, 8, 15, 2, 36, 10, 3, 16, 6, 5, 4, 9, 2, 7, 24, 11, 2, 3, 4
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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EXAMPLE
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n=1 4/2; n=2 6/3; n=3 8/2.
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MAPLE
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with(numtheory): a := proc (n) if isprime(n) = false then n/factorset(n)[nops(factorset(n))] else end if end proc: seq(a(n), n = 2 .. 130); # Emeric Deutsch, Jun 27 2009
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MATHEMATICA
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With[{cmps=Select[Range[200], CompositeQ]}, #/FactorInteger[#][[-1, 1]]&/@ cmps] (* Harvey P. Dale, Mar 29 2017 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Trevor Cassiliano (casstjc(AT)gmail.com), Jun 01 2009
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EXTENSIONS
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STATUS
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approved
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