OFFSET
1,1
COMMENTS
Powerful numbers are n such that p | n -> p^2 | n for all primes p, see A001694.
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..150
PROG
(PARI) list(lim)=my(v=List(), x3, t); for(x=1, sqrtnint(lim\1-1, 3), x3=x^3; for(y=1, x, if(gcd(x, y)>1, next); t=x3+y^3; if(t>lim, break); if(ispowerful(t), listput(v, t)))); Set(v)
CROSSREFS
KEYWORD
nonn
AUTHOR
Charles R Greathouse IV, Feb 17 2014
STATUS
approved