id:A067401 - OEIS Search Results

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Minimal non-uniquely factorizable OR-numbrals, i.e. numbrals that are not uniquely factorizable but for which all proper divisors are.

+0
4

15, 85, 95, 111, 123, 125, 175, 191, 207, 223, 239, 243, 245, 247, 251, 253, 351, 367, 379, 381, 399, 415, 443, 445, 447, 463, 483, 487, 493, 499, 501, 507, 585, 603, 621, 631, 639, 685, 687, 701, 725, 729, 731, 735, 757, 763, 783, 799, 827, 831, 873, 877 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`See A048888 for the definition of OR-numbral arithmetic.`
	EXAMPLE	`15 is in A067401 since [15] = [3] * [5] = [3]^3 all divisors of [15] are uniquely factorizable`
	CROSSREFS	`Cf. A003986, A007059, A048888, A067138, A067139, A067398, A067399, A067400.` `Sequence in context: A108674 A050405 A020136 this_sequence A160599 A091286 A064058` `Adjacent sequences: A067398 A067399 A067400 this_sequence A067402 A067403 A067404`
	KEYWORD	`nonn`
	AUTHOR	`Jens Voss (jens.voss(AT)poet.de), Jan 24 2002`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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