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A119911
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Natural numbers with number of divisors not equal to a Lucas number.
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2
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12, 16, 18, 20, 24, 28, 30, 32, 36, 40, 42, 44, 45, 48, 50, 52, 54, 56, 60, 63, 66, 68, 70, 72, 75, 76, 78, 80, 81, 84, 88, 90, 92, 96, 98, 99, 100, 102, 104, 105, 108, 110, 112, 114, 116, 117, 120, 124, 126, 128, 130, 132, 135, 136, 138, 140, 144, 147, 148
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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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With[{lnos=LucasL[Range[0, 20]]}, Select[Range[300], !MemberQ[ lnos, DivisorSigma[ 0, #]]&]] (* Harvey P. Dale, May 11 2014 *)
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CROSSREFS
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KEYWORD
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easy,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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