id:A067558 - OEIS Search Results

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Sum of squares of proper divisors of n.

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0, 1, 1, 5, 1, 14, 1, 21, 10, 30, 1, 66, 1, 54, 35, 85, 1, 131, 1, 146, 59, 126, 1, 274, 26, 174, 91, 266, 1, 400, 1, 341, 131, 294, 75, 615, 1, 366, 179, 610, 1, 736, 1, 626, 341, 534, 1, 1106, 50, 755, 299, 866, 1, 1184, 147, 1114, 371 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`a(n) = A001157(n) - n^2.` `a(n) = 1 iff n is prime.`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..10000`
	EXAMPLE	`a(12) = 1^2 + 2^2 + 3^2 + 4^2 + 6^2 = 1 + 4 + 9 + 16 + 36 = 66.`
	CROSSREFS	`Cf. A001157, A032741.` `Adjacent sequences: A067555 A067556 A067557 this_sequence A067559 A067560 A067561` `Sequence in context: A094049 A081224 A104793 this_sequence A104792 A120393 A094368`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 29, 2002`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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