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