id:A015640 - OEIS Search Results

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Number of 5-tuples of different integers from [ 1,n ] with no global factor.

+0
1

0, 0, 0, 0, 1, 6, 21, 56, 126, 251, 461, 786, 1281, 1981, 2981, 4311, 6131, 8436, 11496, 15246, 20076, 25851, 33166, 41656, 52281, 64436, 79316, 96151, 116626, 139246, 166651, 196751, 232501, 271601, 317961, 367616, 426521, 489506 (list; graph; listen)

	OFFSET	`1,6`
	CROSSREFS	`Adjacent sequences: A015637 A015638 A015639 this_sequence A015641 A015642 A015643` `Sequence in context: A015641 A050190 A008498 this_sequence A138780 A108907 A008488`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

AT&T Labs Research