id:A049104 - OEIS Search Results

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Numbers n such that n and n-1 both have 6 divisors.

+0
3

45, 76, 99, 117, 148, 172, 243, 244, 245, 333, 388, 508, 549, 604, 605, 725, 845, 909, 932, 964, 1076, 1084, 1252, 1325, 1413, 1468, 1557, 1588, 1676, 1773, 2524, 2525, 2637, 2645, 2764, 3284, 3357, 3412, 3509, 3789, 3988, 4076, 4204, 4205, 4419, 4492, 4805, 4869, 4924, 4925 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`D. Wells, The Penguin Dictionary of Curious and Interesting Numbers, Penguin Books, p. 103`
	CROSSREFS	`Cf. A038400, A049103.` `Sequence in context: A053720 A093764 A082452 this_sequence A026060 A138171 A063343` `Adjacent sequences: A049101 A049102 A049103 this_sequence A049105 A049106 A049107`
	KEYWORD	`nonn`
	AUTHOR	`njas, Felice Russo (felice.russo(AT)katamail.com), Olivier Gerard (ogerard(AT)ext.jussieu.fr)`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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