A111159 - OEIS

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A111159

Numbers n such that A111075(n) is odd.

1, 3, 4, 6, 12, 16, 24, 25, 27, 48, 49, 54, 64, 75, 96, 100, 108, 121, 147, 150, 169, 192, 196, 216, 243, 256, 289, 294, 300, 361, 363, 384, 400, 432, 484, 486, 507, 529, 588, 600, 625, 675, 676, 726, 768, 784, 841, 864, 867, 961, 972, 1014, 1024 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`Conjecture: A111075(n) is odd whenever: (i) n = m^2 for all m>=1 such that 3 does not divide m, or (ii) n = 3*A028982(m) for all m>=1. Also, A028982 gives "Union of nonzero squares and twice squares."` `It is not difficult to show that the conjecture is true. - Max Alekseyev (maxale(AT)gmail.com), Oct 12 2005`
	CROSSREFS	`Sequence in context: A044843 A024373 A015888 * A109069 A124571 A095765` `Adjacent sequences: A111156 A111157 A111158 * A111160 A111161 A111162`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Oct 12 2005`

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Last modified February 15 23:34 EST 2012. Contains 205860 sequences.