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A186979 Number of ordered octuples of distinct pairwise coprime positive integers with largest element n. 4
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 (list; graph; refs; listen; history; text; internal format)
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 A079137 A181689

Adjacent sequences:  A186976 A186977 A186978 * A186980 A186981 A186982

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Mar 02 2011

STATUS

approved

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Last modified December 13 10:19 EST 2018. Contains 318086 sequences. (Running on oeis4.)