A015641 Number of 5-tuples of different integers from [ 2,n ] with no global factor.

0, 0, 0, 0, 1, 6, 21, 56, 125, 251, 456, 786, 1266, 1980, 2946, 4311, 6056, 8436, 11370, 15231, 19866, 25851, 32801, 41655, 51786, 64366, 78601, 96151, 115495, 139246, 165286, 196541, 230681, 271585, 315256, 367616, 423461, 489011

Offset

2,6

Links

Table of n, a(n) for n=2..39.

Crossrefs

Sequence in context: A259474 A002817 A132366 * A292950 A282845 A341135

Adjacent sequences: A015638 A015639 A015640 * A015642 A015643 A015644

Keyword

nonn

Author

Olivier Gérard

Status

approved