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%I #15 Jan 14 2019 04:39:44
%S 0,1,3,2,5,4,7,6,9,8,90,10,11,13,15,17,19,23,25,27,29,30,31,32,33,35,
%T 37,39,45,47,49,50,51,52,53,54,55,57,59,67,69,70,71,72,73,74,75,76,77,
%U 79,89,91,92,93,94,95,96,97,98,99,101,103,105,107,109,110,111,113,115,117,119,130,131,132,301,133,135,137,139,150,151,152
%N The larger digit of any pair of adjacent digits is always odd.
%C The sequence is started with a(1) = 0 and always extended with the smallest integer not yet present and not leading to a contradiction.
%H Jean-Marc Falcoz, <a href="/A282650/b282650.txt">Table of n, a(n) for n = 1..10001</a>
%e In the 1st pair of digits (0,1) the larger digit is (1), which is odd;
%e in the 2nd pair of digits (1,3) the larger digit is (3), which is odd;
%e in the 3rd pair of digits (3,2) the larger digit is (3), which is odd;
%e in the 4th pair of digits (2,5) the larger digit is (5), which is odd;
%e ...
%e in the 9th pair of digits (9,8) the larger digit is (9), which is odd;
%e in the 10th pair of digits (8,9) the larger digit is (9), which is odd;
%e in the 11th pair of digits (0,1) the larger digit is (1), which is odd; etc.
%Y Cf. A282651 (... is always even).
%K nonn,base
%O 1,3
%A _Eric Angelini_ and _Jean-Marc Falcoz_, Feb 20 2017
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