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A015657 Number of ordered 5-tuples of integers from [ 2,n ] with no common factors among triples. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,4

LINKS

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

CROSSREFS

Sequence in context: A218464 A060809 A112547 * A106131 A167303 A025634

Adjacent sequences:  A015654 A015655 A015656 * A015658 A015659 A015660

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified March 19 13:08 EDT 2019. Contains 321330 sequences. (Running on oeis4.)