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A102750 Numbers n such that square of largest prime dividing n does not divide n. 18
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..25000

EXAMPLE

63 is included because 63 = 3^2 *7 and 7 (the largest prime dividing 63) only divides 63 once.

PROG

(PARI) isok(n) = my(f = factor(n)); n % f[#f~, 1]^2; \\ Michel Marcus, May 20 2014

CROSSREFS

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

KEYWORD

nonn

AUTHOR

Leroy Quet, Feb 09 2005

EXTENSIONS

More terms from Erich Friedman, Aug 08 2005

STATUS

approved

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Last modified January 16 06:59 EST 2019. Contains 319188 sequences. (Running on oeis4.)