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A119798 Numbers m such that m and 2*m have the same number of distinct digits in decimal representation.

%I A119798 #11 Jul 13 2013 12:03:24
%S A119798 0,1,2,3,4,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,
%T A119798 29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,56,
%U A119798 57,58,59,61,72,83,94,100,101,102,103,104,105,107,108,109,110,111,112,113
%N A119798 Numbers m such that m and 2*m have the same number of distinct digits in decimal representation.
%C A119798 A043537(a(n)) = A043537(2*a(n)).
%H A119798 Reinhard Zumkeller, <a href="/A119798/b119798.txt">Table of n, a(n) for n = 1..10000</a>
%t A119798 snddQ[n_]:=Count[DigitCount[n],_?(#>0&)]==Count[DigitCount[2n], _?(#>0&)]; Select[Range[0,120],snddQ] (* _Harvey P. Dale_, Oct 07 2012 *)
%o A119798 (Haskell)
%o A119798 a119798 n = a119798_list !! (n-1)
%o A119798 a119798_list = f [0..] a043537_list a043537_list where
%o A119798    f (z:zs) (u:us) (v:_:vs) | u /= v   = f zs us vs
%o A119798                             | otherwise = z : f zs us vs
%o A119798 -- _Reinhard Zumkeller_, Jan 04 2012
%Y A119798 Cf. A119797, A119799.
%K A119798 nonn,base
%O A119798 1,3
%A A119798 _Reinhard Zumkeller_, May 25 2006
%E A119798 Offset fixed by _Reinhard Zumkeller_, Jan 04 2012