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%I #13 Dec 10 2019 00:20:18
%S 1,11,12,2,3,31,13,32,21,14,4,5,51,15,52,22,23,33,34,41,16,6,7,71,17,
%T 72,24,42,25,53,35,54,43,36,61,18,8,9,91,19,92,26,62,27,73,37,74,44,
%U 45,55,56,63,38,81,110,10,20,201,111,112,28,82,29,93,39,94
%N Lexicographically earliest sequence of distinct positive integers such that the concatenation of the odd-indexed terms equals the concatenation of the even-indexed terms.
%C Leading zeros are ignored.
%H Rémy Sigrist, <a href="/A329127/b329127.txt">Table of n, a(n) for n = 1..10000</a>
%H Rémy Sigrist, <a href="/A329127/a329127.gp.txt">PARI program for A329127</a>
%e The first terms of the odd and even bisections are:
%e +------+-+---+-+---+---+-+---+---+---+---+---+-+---+---+---+---+---+---+
%e | odd |1|1 2|3|1 3|2 1|4|5 1|5 2|2 3|3 4|1 6|7|1 7|2 4|2 5|3 5|4 3|6 1| ...
%e +------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
%e | even |1 1|2|3 1|3 2|1 4|5|1 5|2 2|3 3|4 1|6|7 1|7 2|4 2|5 3|5 4|3 6|1 8| ...
%e +------+---+-+---+---+---+-+---+---+---+---+-+---+---+---+---+---+---+---+
%o (PARI) See Links section.
%Y Cf. A197124.
%K nonn,base
%O 1,2
%A _Rémy Sigrist_, Nov 05 2019
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