id:A015623 - OEIS Search Results

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Quadruples of different integers from [ 1,n ] with no common factors between pairs.

+0
1

0, 0, 0, 0, 2, 2, 10, 14, 24, 26, 68, 72, 151, 167, 192, 228, 411, 431, 708, 758, 858, 928, 1419, 1475, 1874, 2013, 2353, 2499, 3515, 3571, 4856, 5254, 5747, 6089, 6795, 6979, 9129, 9630, 10437, 10800, 13768, 13978, 17500, 18275, 19210, 20114, 24734 (list; graph; listen)

	OFFSET	`1,5`
	CROSSREFS	`Sequence in context: A066966 A132443 A048153 this_sequence A003609 A102446 A102345` `Adjacent sequences: A015620 A015621 A015622 this_sequence A015624 A015625 A015626`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (ogerard(AT)ext.jussieu.fr)`

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.

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