A162641 - OEIS

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A162641

Number of even exponents in canonical prime factorization of n.

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

	OFFSET	`1,36`
	COMMENTS	`a(n) = A001221(n) - A162642(n);` `a(A002035(n)) = 0; a(A072587(n)) > 0.`
	CROSSREFS	`Sequence in context: A014082 A102354 A193138 * A087781 A181009 A056626` `Adjacent sequences: A162638 A162639 A162640 * A162642 A162643 A162644`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 08 2009`

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Last modified February 17 08:44 EST 2012. Contains 205998 sequences.