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Search: id:A094784
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| A094784 |
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Numbers that are neither squares nor cubes. |
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+0
1
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| 2, 3, 5, 6, 7, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 26, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 82
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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R. Honsberger, Mathematical Chestnuts from Around the World, MAA, 2001; see p. 168.
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PROGRAM
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(PARI) g(n) = for(x=0, n, if(!issquare(x)&&!iscube(x), print1(x", "))) iscube(n) = { local(r); r = n^(1/3); if(floor(r+.5)^3== n, 1, 0)
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CROSSREFS
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A005117 (square-free numbers) intersect A004709 (cube-free numbers) would be A005117; A005117 union A004709 would be A004709.
Adjacent sequences: A094781 A094782 A094783 this_sequence A094785 A094786 A094787
Sequence in context: A129125 A071591 A028769 this_sequence A085971 A007916 A052485
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KEYWORD
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nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Jun 10 2004
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EXTENSIONS
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Definition corrected by Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 11 2004
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