

A282651


The larger digit of any pair of adjacent digits is always even.


2



0, 2, 1, 4, 3, 6, 5, 8, 7, 80, 20, 21, 22, 12, 14, 16, 18, 24, 26, 28, 34, 36, 38, 40, 41, 42, 43, 44, 46, 48, 56, 58, 60, 61, 62, 63, 64, 65, 66, 68, 78, 81, 82, 83, 84, 85, 86, 87, 88, 120, 200, 202, 121, 204, 122, 124, 126, 128, 140, 206, 141, 208, 142, 143, 400, 212, 144, 146, 148, 160, 214, 161, 216, 162, 163, 402, 164, 165, 600
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OFFSET

1,2


COMMENTS

The sequence is started with a(1) = 0 and always extended with the smallest integer not yet present and not leading to a contradiction.


LINKS

JeanMarc Falcoz, Table of n, a(n) for n = 1..10001


EXAMPLE

In the 1st pair of digits (0,2) the larger digit is (2), which is even;
in the 2nd pair of digits (2,1) the larger digit is (2), which is even;
in the 3rd pair of digits (1,4) the larger digit is (4), which is even;
in the 4th pair of digits (4,3) the larger digit is (4), which is even;
...
in the 9th pair of digits (7,8) the larger digit is (8), which is even;
in the 10th pair of digits (8,0) the larger digit is (8), which is even;
in the 11th pair of digits (0,2) the larger digit is (2), which is even; etc.


CROSSREFS

Cf. A282650 (... is always odd).
Sequence in context: A026262 A026234 A317630 * A282665 A320283 A232805
Adjacent sequences: A282648 A282649 A282650 * A282652 A282653 A282654


KEYWORD

nonn,base


AUTHOR

Eric Angelini and JeanMarc Falcoz, Feb 20 2017


STATUS

approved



