id:A139716 - OEIS Search Results

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If k is the largest divisor of n that is <= sqrt(n) then a(n) = n - k^2.

+0
2

0, 1, 2, 0, 4, 2, 6, 4, 0, 6, 10, 3, 12, 10, 6, 0, 16, 9, 18, 4, 12, 18, 22, 8, 0, 22, 18, 12, 28, 5, 30, 16, 24, 30, 10, 0, 36, 34, 30, 15, 40, 6, 42, 28, 20, 42, 46, 12, 0, 25, 42, 36, 52, 18, 30, 7, 48, 54, 58, 24, 60, 58, 14, 0, 40, 30, 66, 52, 60, 21, 70, 8, 72, 70, 50, 60, 28, 42 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`a(p) = p-1 for all primes p. a(n^2) = 0 for all positive integers n.`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	CROSSREFS	`Cf. A139717, A033676.` `Sequence in context: A097945 A153733 A083218 this_sequence A163123 A068773 A133168` `Adjacent sequences: A139713 A139714 A139715 this_sequence A139717 A139718 A139719`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet, May 01 2008`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 01 2009`

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

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