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A360070
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Numbers for which there exists an integer partition such that the parts have the same mean as the multiplicities.
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1
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1, 4, 8, 9, 12, 16, 18, 20, 25, 27, 32, 36, 45, 48, 49, 50, 54, 63, 64, 72, 75, 80, 81, 90, 96, 98, 99, 100, 108, 112, 117, 121, 125, 128, 144, 147, 150, 160, 162, 169, 175, 176, 180, 192, 196, 200, 208, 216, 224, 225, 240, 242, 243, 245, 250, 252, 256, 272
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OFFSET
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1,2
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COMMENTS
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Conjecture: No term > 1 is squarefree.
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LINKS
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EXAMPLE
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A partition of 20 with the same mean as its multiplicities is (5,4,3,2,1,1,1,1,1,1), so 20 is in the sequence.
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MATHEMATICA
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Select[Range[30], Select[IntegerPartitions[#], Mean[#]==Mean[Length/@Split[#]]&]!={}&]
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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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