OFFSET
1,2
FORMULA
a(n) = 1234567890 after any digits not appearing in n are removed
EXAMPLE
a(93077) = 3790. Seven is only used once and the digits are sorted with zero last
MATHEMATICA
udno[n_]:=Module[{c=Union[IntegerDigits[n]]}, FromDigits[If[First[c] == 0, RotateLeft[ c], c]]]; Array[udno, 70] (* Harvey P. Dale, Dec 23 2015 *)
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Dominick Cancilla, Sep 02 2010
STATUS
approved