A015657 Number of ordered 5-tuples of integers from [ 2,n ] with no common factors among triples.

0, 0, 0, 8, 10, 51, 83, 165, 216, 531, 637, 1284, 1607, 2159, 2756, 4705, 5353, 8462, 9829, 12378, 14514, 21227, 23433, 31079, 35600, 43705, 49266, 66390, 70849, 93223, 104603, 122139, 135745, 162248, 173565, 218847, 240639, 275249, 297212

Offset

2,4

Links

Table of n, a(n) for n=2..40.

Crossrefs

Sequence in context: A218464 A060809 A112547 * A167303 A025634 A038288

Adjacent sequences: A015654 A015655 A015656 * A015658 A015659 A015660

Keyword

nonn

Author

Olivier Gérard

Status

approved