id:A065043 - OEIS Search Results

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Characteristic function of the numbers with an even number of prime factors (counted with multiplicity): a(n) = 1 if n = A028260(k) for some k then 1 else 0.

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1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = 1 - A001222(n) mod 2.`
	CROSSREFS	`a(A028260(k)) = 1 and a(A026424(k)) = 0 for all k.` `1's-complement of A066714.` `A007421(n) - 1.` `Adjacent sequences: A065040 A065041 A065042 this_sequence A065044 A065045 A065046` `Sequence in context: A104015 A101266 A105367 this_sequence A121559 A004641 A100810`
	KEYWORD	`mult,nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 05 2001`

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

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