OFFSET
1,2
EXAMPLE
We have a(5) = 7 since 7! = 5040 and no smaller factorial number begins with 5 in base 10.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Lekraj Beedassy, Nov 04 2002
EXTENSIONS
More terms from Lambert Klasen (lambert.klasen(AT)gmx.de), Jan 13 2005
STATUS
approved