id:A039832 - OEIS Search Results

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Numbers n such that n and n+1 both have 4 divisors.

+0
4

14, 21, 26, 33, 34, 38, 57, 85, 86, 93, 94, 118, 122, 133, 141, 142, 145, 158, 177, 201, 202, 205, 213, 214, 217, 218, 253, 298, 301, 302, 326, 334, 381, 393, 394, 445, 446, 453, 481, 501, 514, 526, 537, 542, 553, 565, 622, 633, 634, 694, 697, 698, 706, 717, 745, 766, 778, 793, 802, 817 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`D. Wells, Curious and interesting numbers, Penguin Books.`
	EXAMPLE	`14 and 15 both have 4 as number of divisors and are consecutive.`
	CROSSREFS	`Cf. A038456, A039833.` `Sequence in context: A025339 A096017 A006614 this_sequence A108633 A110478 A125967` `Adjacent sequences: A039829 A039830 A039831 this_sequence A039833 A039834 A039835`
	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 26 23:19 EDT 2008. Contains 142293 sequences.

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