A065745 - OEIS

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A065745

Sum of squares and twice squares dividing n.

1, 3, 1, 7, 1, 3, 1, 15, 10, 3, 1, 7, 1, 3, 1, 31, 1, 30, 1, 7, 1, 3, 1, 15, 26, 3, 10, 7, 1, 3, 1, 63, 1, 3, 1, 70, 1, 3, 1, 15, 1, 3, 1, 7, 10, 3, 1, 31, 50, 78, 1, 7, 1, 30, 1, 15, 1, 3, 1, 7, 1, 3, 10, 127, 1, 3, 1, 7, 1, 3, 1, 150, 1, 3, 26, 7, 1, 3, 1, 31, 91, 3, 1, 7, 1, 3, 1, 15, 1, 30, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Matthew M. Conroy, Home page (listed instead of email address)`
	FORMULA	`Multiplicative with a(2^e)=2^(e+1)-1, a(p^e)=(p^(e+2)-1)/(p-1)/(p+1) for odd p and even e and a(p^e)=(p^(e+1)-1)/(p-1)/(p+1) for odd p and odd e.`
	CROSSREFS	`Cf. A065704, A035316.` `Sequence in context: A112132 A053381 A038712 * A117677 A038870 A186428` `Adjacent sequences: A065742 A065743 A065744 * A065746 A065747 A065748`
	KEYWORD	`mult,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Dec 04 2001`
	EXTENSIONS	`More terms from Matthew M. Conroy, Jan 19 2002`

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Last modified February 17 02:31 EST 2012. Contains 205978 sequences.