OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Geometric Mean
EXAMPLE
a(12) = 10 subsets: {1}, {2}, {3}, {4}, {6}, {12}, {1, 4}, {3, 12}, {1, 2, 4} and {3, 6, 12}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Dec 11 2020
STATUS
approved