OFFSET
1,1
COMMENTS
All entries are in A001358.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
a(1)=2*2*2/2=4. a(2)=2*2*3/2=6. a(3)=2*3*3/3=6. a(4)=2*2*5/2=10. a(5)=3*3*3/3 = 9.
MAPLE
f:= proc(n) local P;
if numtheory:-bigomega(n) <> 3 then return NULL fi;
P:= numtheory:-factorset(n);
min(P)*max(P)
end proc:
map(f, [$1..500]); # Robert Israel, Jun 05 2023
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Juri-Stepan Gerasimov, Jul 22 2009
EXTENSIONS
a(57) corrected by R. J. Mathar, Jul 25 2009
STATUS
approved