OFFSET
1,1
COMMENTS
LINKS
Robert Israel, Table of n, a(n) for n = 1..2528
EXAMPLE
a(3)=13824 is a member because 13824= 2^9*3^3, 9 and 3 are both greater than 1 and (9-1)+(3-1)=10.
MAPLE
N:= 10^6: # to get all terms <= N
p:= 1:
for i from 1 to 10 do F[i]:= {} od:
do
p:= nextprime(p);
if p^2 > N then break fi;
for i from min(10, floor(log[p](N))-1) to 2 by -1 do F[i]:= F[i] union
select(`<=`, `union`({p^(i+1)}, seq(map(t -> p^(i+1-j)*t, F[j]), j=1..i-1)), N)
od;
F[1]:= F[1] union {p^2};
od:
sort(convert(F[10], list));
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert Israel, Jul 04 2018
STATUS
approved