id:A015625 - OEIS Search Results

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

+0
1

0, 0, 0, 1, 5, 12, 31, 53, 99, 148, 257, 335, 531, 690, 948, 1192, 1685, 1977, 2689, 3171, 3961, 4651, 5987, 6716, 8353, 9539, 11340, 12781, 15599, 16945, 20417, 22705, 26066, 28814, 33405, 35980, 42059, 45966, 51636, 55816, 64226, 68205 (list; graph; listen)

	OFFSET	`1,5`
	CROSSREFS	`Adjacent sequences: A015622 A015623 A015624 this_sequence A015626 A015627 A015628` `Sequence in context: A009412 A009428 A094125 this_sequence A038357 A090974 A038606`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified October 9 14:06 EDT 2008. Contains 144831 sequences.

AT&T Labs Research