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A228595 Lexicographically earliest sequence of distinct positive integers such that the concatenation of the terms equals the concatenation of the positive integers, and no term appears in its natural position.

%I A228595 #18 Apr 25 2016 12:00:15
%S A228595 12,34,56,78,910,1,11,2,131,4,151,6,171,8,1920,212,22,3,242,5,262,7,
%T A228595 282,9,303,13,23,33,43,53,63,73,83,940,414,24,344,454,64,74,84,950,
%U A228595 515,25,35,45,55,65,75,85,960,616,26,36,46,566,676,86,970,717,27
%N A228595 Lexicographically earliest sequence of distinct positive integers such that the concatenation of the terms equals the concatenation of the positive integers, and no term appears in its natural position.
%C A228595 Leading zeros are forbidden.
%C A228595 For any n>0, the concatenation of the (n-1) first terms never equals the concatenation of the (a(n)-1) first positive integers.
%H A228595 Paul Tek, <a href="/A228595/b228595.txt">Table of n, a(n) for n = 1..10000</a>
%H A228595 Paul Tek, <a href="/A228595/a228595.txt">PERL program for this sequence</a>
%e A228595 The positive integers:
%e A228595 +-+-+-+-+-+-+-+-+-+---+---+---+---+---+---+---+---+---+
%e A228595 |1|2|3|4|5|6|7|8|9|1 0|1 1|1 2|1 3|1 4|1 5|1 6|1 7|1 8| ...
%e A228595 +-+-+-+-+-+-+-+-+-+---+---+---+---+---+---+---+---+---+
%e A228595 This sequence:
%e A228595 +---+---+---+---+-----+-+---+-+-----+-+-----+-+-----+-+
%e A228595 |1 2|3 4|5 6|7 8|9 1 0|1|1 1|2|1 3 1|4|1 5 1|6|1 7 1|8| ...
%e A228595 +---+---+---+---+-----+-+---+-+-----+-+-----+-+-----+-+
%o A228595 (Perl) See Link section.
%Y A228595 Cf. A033307, A064809, A098067, A197124.
%K A228595 nonn,base
%O A228595 1,1
%A A228595 _Paul Tek_, Aug 27 2013