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A015656 Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among triples. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A015635 A062882 A027101 * A188797 A056372 A181574

Adjacent sequences:  A015653 A015654 A015655 * A015657 A015658 A015659

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified February 22 18:31 EST 2019. Contains 320400 sequences. (Running on oeis4.)