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 A178788 Characteristic function of numbers having distinct digits in their decimal representation. 19
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS a(A010784(n)) = 1; a(A109303(n)) = 0; first differences of A178787. a(n) <= A196368(n). a(n) = 0 for n > 9*9!. - Hieronymus Fischer, Feb 02 2013 LINKS R. Zumkeller, Table of n, a(n) for n = 0..10000 Eric Weisstein's World of Mathematics, Digit FORMULA a(n) = 0^(A055642(n)-A043537(n)). MATHEMATICA lst = {}; Do[If[Select[Tally[IntegerDigits[n]][[All, 2]], # > 1 &] == {}, AppendTo[lst, 1], AppendTo[lst, 0]], {n, 0, 104}]; lst (* Arkadiusz Wesolowski, May 10 2012 *) PROG (Haskell) import Data.List (nub) a178788 n = fromEnum \$ nub (show n) == show n -- Reinhard Zumkeller, Sep 25 2011 CROSSREFS Sequence in context: A294935 A242902 A196368 * A131217 A105567 A114213 Adjacent sequences: A178785 A178786 A178787 * A178789 A178790 A178791 KEYWORD base,nonn AUTHOR Reinhard Zumkeller, Jun 30 2010 STATUS approved

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Last modified December 10 02:09 EST 2022. Contains 358712 sequences. (Running on oeis4.)