A282651 The larger digit of any pair of adjacent digits is always even.

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

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

Jean-Marc 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: A026234 A352726 A317630 * A282665 A320283 A232805

Adjacent sequences: A282648 A282649 A282650 * A282652 A282653 A282654

Keyword

nonn,base

Author

Eric Angelini and Jean-Marc Falcoz, Feb 20 2017

Status

approved