OFFSET
1,2
EXAMPLE
a(2) = 3 because we have 1/2 = 1/4 + 1/4 = 1/3 + 1/6 = 1/6 + 1/3.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Ilya Gutkovskiy, Apr 08 2021
EXTENSIONS
a(5)-a(6) from Max Alekseyev, Jan 24 2024
STATUS
approved