A186979 - OEIS

A186979

Number of ordered octuples of distinct pairwise coprime positive integers with largest element n.

8, 0, 65, 2, 4, 2, 339, 8, 291, 31, 264, 42, 2576, 8, 6527, 1436, 967, 610, 1518, 232, 21395, 1793, 3123, 1002, 50310, 540, 93852, 8394, 8646, 9696, 187722, 6072, 141942, 13860, 44814, 25542, 472593, 15444, 126012, 33198, 96078, 60294, 959714

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OFFSET

17,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 17..200

EXAMPLE

a(20) = 2 because there are 2 ordered octuples of distinct pairwise coprime positive integers with largest element 20: (1,3,7,11,13,17,19,20), (1,7,9,11,13,17,19,20).

CROSSREFS

Column 8 of triangle A186972. First differences of A186984.

Sequence in context: A137528 A270006 A167318 * A067817 A350452 A079137

Adjacent sequences: A186976 A186977 A186978 * A186980 A186981 A186982

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Mar 02 2011

STATUS

approved