A015656 - OEIS

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A015656

Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among triples.

1, 3, 9, 18, 51, 72, 176, 264, 447, 586, 1128, 1362, 2374, 2943, 3868, 4841, 7578, 8633, 12828, 14847, 18432, 21480, 30081, 33223, 43022, 49051, 59449, 66796, 87627, 93688, 120554, 134772, 156325, 173243, 205164, 219513, 272331, 298743

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..38.

CROSSREFS

Sequence in context: A062882 A363534 A027101 * A188797 A056372 A181574

Adjacent sequences: A015653 A015654 A015655 * A015657 A015658 A015659

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved