id:A105442 - OEIS Search Results

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Numbers with at least two odd prime factors (not necessarily distinct) such that in binary representation all divisors of n are contained in n.

+0
2

55, 215, 407, 1403, 1681, 3223, 3362, 3415, 6724, 13448, 13655, 15487, 25751, 80089, 146621, 160178, 218455, 237169, 320356, 445663, 464711, 474338, 873815, 948676, 1662743, 1897352, 1932377, 1975531, 2484187, 3223001, 3410639, 3872639 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Intersection of A093641 and A105441;` `A087436(a(n)) > 1.`
	CROSSREFS	`Cf. A093642, A093641.` `Adjacent sequences: A105439 A105440 A105441 this_sequence A105443 A105444 A105445` `Sequence in context: A068641 A039781 A135657 this_sequence A020182 A140197 A020280`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 09 2005`

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.

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