id:A089384 - OEIS Search Results

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Greatest square-free proper divisor of n, a(1) = 1.

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1, 1, 1, 2, 1, 3, 1, 2, 3, 5, 1, 6, 1, 7, 5, 2, 1, 6, 1, 10, 7, 11, 1, 6, 5, 13, 3, 14, 1, 15, 1, 2, 11, 17, 7, 6, 1, 19, 13, 10, 1, 21, 1, 22, 15, 23, 1, 6, 7, 10, 17, 26, 1, 6, 11, 14, 19, 29, 1, 30, 1, 31, 21, 2, 13, 33, 1, 34, 23, 35, 1, 6, 1, 37, 15, 38, 11, 39, 1, 10, 3, 41, 1, 42 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`a(n) = if n is square-free then A032742(n) else A007947(n);` `a(n) = A008966(n)A032742(n) + (1-A008966(n))A007947(n).`
	CROSSREFS	`Cf. A005117, A013929.` `Sequence in context: A056609 A014673 A085392 this_sequence A144113 A165416 A057059` `Adjacent sequences: A089381 A089382 A089383 this_sequence A089385 A089386 A089387`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 28 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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