OFFSET
1,3
COMMENTS
Numbers n such that n! = x^2 + y^3 where x, y are integers and y >= 0, is soluble.
a(7) > 33. - Giovanni Resta, Jun 03 2016
EXAMPLE
4 is a term because 4! = 4^2 + 2^3.
19 is a term because 19! = 345427200^2 + 132480^3.
21 is a term because 21! = 6389296200^2 + 2173500^3.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Altug Alkan, May 25 2016
STATUS
approved