id:A098371 - OEIS Search Results

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#{m: GCD(n,a(m)) = Max{GCD(n,a(k)): 1<=k<n}}.

+0
4

1, 1, 2, 1, 4, 2, 6, 1, 1, 4, 10, 1, 12, 7, 1, 3, 16, 2, 18, 1, 1, 10, 22, 1, 2, 13, 1, 1, 28, 2, 30, 1, 1, 16, 2, 1, 36, 19, 1, 3, 40, 1, 42, 1, 1, 21, 46, 2, 4, 4, 9, 1, 52, 2, 1, 1, 1, 27, 58, 1, 60, 29, 2, 2, 2, 1, 66, 12, 1, 2, 70, 1, 72, 37, 2, 1, 2, 1, 78, 1, 1, 40, 82, 1, 7, 42, 2, 2, 88, 2, 3 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`a(n) = n-1 iff n = 1 or n is prime;` `a(A098373(n)) = n and a(m) <> n for m < A098373(n);` `a(A098374(n)) = 1;` `a(n) = #{m: GCD(n,a(m)) = A098372(n)}.`
	CROSSREFS	`Cf. A096216, A000010.` `Sequence in context: A161293 A057923 A147763 this_sequence A070777 A023900 A141564` `Adjacent sequences: A098368 A098369 A098370 this_sequence A098372 A098373 A098374`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 05 2004`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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