OFFSET
1,2
EXAMPLE
a(12) = reverse(12)! = 21! = 51090942171709440000.
MATHEMATICA
Table[FromDigits[Reverse[IntegerDigits[n]]]!, {n, 1, 15}]
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Joseph L. Pe, Jun 14 2002
STATUS
approved