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 A180409 Unique digits used in n in numerical order (with 0 last) 1
 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 12, 13, 14, 15, 16, 17, 18, 19, 20, 12, 2, 23, 24, 25, 26, 27, 28, 29, 30, 13, 23, 3, 34, 35, 36, 37, 38, 39, 40, 14, 24, 34, 4, 45, 46, 47, 48, 49, 50, 15, 25, 35, 45, 5, 56, 57, 58, 59, 60, 16, 26, 36, 46, 56, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS 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 Sequence in context: A262401 A118541 A084905 * A320485 A321802 A337864 Adjacent sequences:  A180406 A180407 A180408 * A180410 A180411 A180412 KEYWORD easy,nonn,base AUTHOR Dominick Cancilla, Sep 02 2010 STATUS approved

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Last modified May 9 10:18 EDT 2021. Contains 343732 sequences. (Running on oeis4.)