OFFSET
4,2
EXAMPLE
a(6) = 6!(1/4! + 1/6!) = 31.
MAPLE
a:=proc(n) local s, i :s:=0: for i from 4 to n do if isprime(i)=false then s:=s+1/i! else s:=s: fi od: n!*s; end; seq(a(n), n=4..24); # Emeric Deutsch, Jul 25 2005
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Amarnath Murthy, Jul 24 2005
EXTENSIONS
More terms from Emeric Deutsch, Jul 25 2005
STATUS
approved