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A186978
Number of ordered septuples of distinct pairwise coprime positive integers with largest element n.
4
6, 0, 0, 2, 56, 1, 219, 13, 27, 15, 777, 28, 640, 102, 563, 127, 3923, 28, 7859, 1792, 1505, 966, 2354, 392, 21313, 2289, 3969, 1344, 42828, 714, 69360, 7566, 8118, 8826, 122883, 5082, 93084, 10890, 33594, 19338, 266024, 11011, 82350, 23298, 63917
OFFSET
13,1
LINKS
EXAMPLE
a(16) = 2 because there are 2 ordered septuples of distinct pairwise coprime positive integers with largest element 16: (1,3,5,7,11,13,16), (1,5,7,9,11,13,16).
CROSSREFS
Column 7 of triangle A186972. First differences of A186983.
Sequence in context: A267333 A337885 A333204 * A228532 A019956 A212720
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Mar 02 2011
STATUS
approved