OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
a(3) = 63 is a term because 63 = 3^2 * 7 = prime(2) * prime(2) * prime(2+2).
MAPLE
N:= 10^4: # for terms <= N
S:= NULL:
for i from 1 do
p:= ithprime(i);
if 2*p^2 > N then break fi;
for j from 1 to i do
v:= p * ithprime(j)*ithprime(i+j);
if v > N then break fi;
S:= S, v
od
od:
sort([S]);
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert Israel, Aug 30 2023
STATUS
approved