OFFSET
43,3
COMMENTS
A set is called nondividing if no element divides the sum of any nonempty subset of the other elements.
LINKS
Eric Weisstein's World of Mathematics, Nondividing Set
EXAMPLE
a(43) = 1 because there is one 7-element nondividing subset of {1,2,...,43}: {24,28,31,35,36,40,43}.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Alois P. Heinz, Mar 10 2011
STATUS
approved