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Remove in decimal representation of A254143(n) all repeated digits.
4

%I #7 Feb 27 2015 16:43:21

%S 1,4,7,16,28,34,37,49,67,136,148,238,259,268,34,37,367,469,67,156,

%T 1258,136,1348,1369,1468,278,238,2359,2479,2569,268,34,37,367,367,489,

%U 469,67,1356,1458,12358,12469,12478,136,1348,13468,13579,1468,2378,2579

%N Remove in decimal representation of A254143(n) all repeated digits.

%C a(n) <= 123456789 for all n, and a(n) < 123456789 for n < 396;

%C a(396) = 123456789 = A050289(1);

%C a(n) = A137564(A254143(n)) = A004086(A227362(A254143(n))).

%H Reinhard Zumkeller, <a href="/A254323/b254323.txt">Table of n, a(n) for n = 1..10000</a>

%o (Haskell)

%o a254323 = a137564 . a254143

%Y Cf. A254143, A137564, A227362, A004086, A050289.

%Y Cf. A254338 (initial digits), A254339 (final digits).

%K nonn,base

%O 1,2

%A _Reinhard Zumkeller_, Jan 28 2015