

A043096


Numbers in which every pair of adjacent digits are distinct.


43



0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69
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OFFSET

1,3


COMMENTS

Superset of A010784. [From R. J. Mathar, Oct 20 2008]
Complement of A171901; A196368(a(n)) = 1. [Reinhard Zumkeller, Oct 28 2001]


LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000


EXAMPLE

11 is the first number not in the sequence, since it has a pair of identical adjacent digits.


MATHEMATICA

t={}; Do[If[!MemberQ[Differences[IntegerDigits[n]], 0], AppendTo[t, n]], {n, 0, 69}]; t (* Jayanta Basu, May 04 2013 *)


PROG

(Haskell)
import Data.List (elemIndices)
a043096 n = a043096_list !! n
a043096_list = elemIndices 1 a196368_list
 Reinhard Zumkeller, Oct 28 2001
(PARI) is(n)=my(v=digits(n)); for(i=2, #v, if(v[i]==v[i1], return(0))); 1 \\ Charles R Greathouse IV, Sep 17 2012


CROSSREFS

Sequence in context: A167520 A051882 A136002 * A160542 A059543 A241158
Adjacent sequences: A043093 A043094 A043095 * A043097 A043098 A043099


KEYWORD

nonn,base


AUTHOR

Clark Kimberling


EXTENSIONS

Offset corrected by Reinhard Zumkeller, Oct 28 2011


STATUS

approved



