id:A072690 - OEIS Search Results

Search: id:A072690

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(n - A048760(n)) * (A048761(n) - n).

+0
2

0, 2, 2, 0, 4, 6, 6, 4, 0, 6, 10, 12, 12, 10, 6, 0, 8, 14, 18, 20, 20, 18, 14, 8, 0, 10, 18, 24, 28, 30, 30, 28, 24, 18, 10, 0, 12, 22, 30, 36, 40, 42, 42, 40, 36, 30, 22, 12, 0, 14, 26, 36, 44, 50, 54, 56, 56, 54, 50, 44, 36, 26, 14, 0, 16, 30, 42, 52, 60, 66, 70, 72, 72, 70, 66 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n)=0 iff n is a square.`
	FORMULA	`a(n) = A053186(n) * (A072689(n) - A053186(n)).`
	CROSSREFS	`a(n) = A053186(n) * A068527(n).` `Adjacent sequences: A072687 A072688 A072689 this_sequence A072691 A072692 A072693` `Sequence in context: A073469 A086882 A100240 this_sequence A108520 A099087 A009545`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jul 02 2002`

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Last modified May 16 19:35 EDT 2008. Contains 139737 sequences.

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