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Search: id:A071404
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| A071404 |
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Which non-square-free number is a square number? a(n)-th non-square-free number equals n^2, the n-th square. |
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2
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| 1, 3, 5, 9, 13, 18, 25, 31, 39, 46, 55, 66, 76, 86, 99, 112, 125, 142, 157, 172, 187, 206, 225, 244, 264, 285, 307, 328, 353, 377, 400, 429, 453, 480, 507, 534, 562, 593, 623, 656, 691, 725, 762, 795, 831, 867, 904, 941, 977, 1019, 1059, 1101, 1145, 1185, 1226
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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A013929[a(n)]=A000290(n+1)=(n+1)^2
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EXAMPLE
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Th first,3rd,5th,9th,13rd non-square-free numbers correspond to 4,9,16,25,36.
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CROSSREFS
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Cf. A005117, A013929, A000040, A000290, A071403.
Sequence in context: A122248 A024403 A129230 this_sequence A074133 A078735 A004132
Adjacent sequences: A071401 A071402 A071403 this_sequence A071405 A071406 A071407
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), May 24 2002
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