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A102750
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Numbers n such that square of largest prime dividing n does not divide n.
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18
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2, 3, 5, 6, 7, 10, 11, 12, 13, 14, 15, 17, 19, 20, 21, 22, 23, 24, 26, 28, 29, 30, 31, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 73, 74, 76, 77, 78, 79, 80, 82, 83, 84, 85
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OFFSET
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1,1
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COMMENTS
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Numbers n such that the exponent of the largest prime dividing n is one. - Harvey P. Dale, May 02 2019
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LINKS
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Rémy Sigrist, Table of n, a(n) for n = 1..25000
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EXAMPLE
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63 is included because 63 = 3^2 *7 and 7 (the largest prime dividing 63) only divides 63 once.
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MATHEMATICA
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Select[Range[2, 100], FactorInteger[#][[-1, 2]]==1&] (* Harvey P. Dale, May 02 2019 *)
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PROG
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(PARI) isok(n) = my(f = factor(n)); n % f[#f~, 1]^2; \\ Michel Marcus, May 20 2014
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CROSSREFS
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Cf. A070003 (complement, apart from the term 1 that is in neither sequence).
Sequence in context: A065872 A028741 A119316 * A317092 A225354 A166111
Adjacent sequences: A102747 A102748 A102749 * A102751 A102752 A102753
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KEYWORD
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nonn
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AUTHOR
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Leroy Quet, Feb 09 2005
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EXTENSIONS
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More terms from Erich Friedman, Aug 08 2005
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STATUS
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approved
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