A105824 - OEIS

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A105824

Sigma(n) (mod 4).

1, 3, 0, 3, 2, 0, 0, 3, 1, 2, 0, 0, 2, 0, 0, 3, 2, 3, 0, 2, 0, 0, 0, 0, 3, 2, 0, 0, 2, 0, 0, 3, 0, 2, 0, 3, 2, 0, 0, 2, 2, 0, 0, 0, 2, 0, 0, 0, 1, 1, 0, 2, 2, 0, 0, 0, 0, 2, 0, 0, 2, 0, 0, 3, 0, 0, 0, 2, 0, 0, 0, 3, 2, 2, 0, 0, 0, 0, 0, 2, 1, 2, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 0, 2, 3, 0, 1, 2, 0, 0, 2, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	MAPLE	`A105824:= n-> (numtheory[sigma](n) mod 4):` `seq (A105824(n), n=1..105); # - Jani Melik, Jan 26 2011`
	PROG	`(PARI) (PARI) a(n)=sigma(n)%4`
	CROSSREFS	`Sequence in context: A051171 A166445 A085919 * A171911 A180193 A070298` `Adjacent sequences: A105821 A105822 A105823 * A105825 A105826 A105827`
	KEYWORD	`easy,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), May 05 2005`

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.