OFFSET
1,2
COMMENTS
It is known that A006532 is an infinite sequence. Is this sequence infinite?
a(12) > 10^12. - Giovanni Resta, Aug 14 2017
LINKS
Giovanni Resta, A list of 3110 terms > 10^12
EXAMPLE
4879 is a term because 1^2 + 7^2 + 17^2 + 41^2 + 119^2 + 287^2 + 697^2 + 4879^2 = 290^3.
PROG
(PARI) isok(n) = ispower(sigma(n, 2), 3);
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Altug Alkan, Aug 12 2017
EXTENSIONS
a(6)-a(11) from Giovanni Resta, Aug 14 2017
STATUS
approved