OFFSET
1,1
EXAMPLE
3 and 5...........5!=120
5 and 7...........7!=5040
17 and 19........19!=121645100408832000
MAPLE
ZL:=[]:for p from 1 to 53 do if (isprime(p) and isprime(p+2)) then ZL:=[op(ZL), ((p+2)!)]; fi; od; print(ZL);
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zerinvary Lajos, Mar 08 2007
STATUS
approved