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A080664
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Numbers n such that n-th Catalan number is squarefree.
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4
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1, 2, 3, 4, 5, 7, 8, 9, 11, 17, 19, 31, 35
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Range[500], SquareFreeQ[CatalanNumber[ # ]] &]
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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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