OFFSET
13,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 13..200
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
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Mar 02 2011
STATUS
approved