Back to Five Fives
Zero 5s
One 5
Various ways of arranging a single 5 to yield different numbers. (More limited than 4, of course...)
Two 5s
Three 5s
Four 5s
(5 base 5 is 10 base 5; 5 base 5 factorial is 440 base 5, or 120 base 10. No surprises here.)