

A282650


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


2



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, 37, 39, 45, 47, 49, 50, 51, 52, 53, 54, 55, 57, 59, 67, 69, 70, 71, 72, 73, 74, 75, 76, 77, 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
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OFFSET

1,3


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 (0,1) the larger digit is (1), which is odd;
in the 2nd pair of digits (1,3) the larger digit is (3), which is odd;
in the 3rd pair of digits (3,2) the larger digit is (3), which is odd;
in the 4th pair of digits (2,5) the larger digit is (5), which is odd;
...
in the 9th pair of digits (9,8) the larger digit is (9), which is odd;
in the 10th pair of digits (8,9) the larger digit is (9), which is odd;
in the 11th pair of digits (0,1) the larger digit is (1), which is odd; etc.


CROSSREFS

Cf. A282651 (... is always even).
Sequence in context: A004442 A065190 A152208 * A270671 A282664 A085230
Adjacent sequences: A282647 A282648 A282649 * A282651 A282652 A282653


KEYWORD

nonn,base


AUTHOR

Eric Angelini and JeanMarc Falcoz, Feb 20 2017


STATUS

approved



