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A342043
When a digit d is even, the next digit is < d.
6
1, 2, 11, 3, 4, 12, 13, 5, 6, 14, 15, 7, 8, 16, 17, 9, 18, 19, 21, 31, 32, 111, 33, 34, 35, 36, 37, 38, 39, 41, 42, 112, 113, 43, 51, 52, 114, 115, 53, 54, 116, 55, 56, 57, 58, 59, 61, 62, 117, 63, 64, 118, 65, 71, 72, 119, 73, 74, 121, 75, 76, 131, 77, 78, 79, 81, 82, 132, 133, 83, 84, 134, 135, 85
OFFSET
1,2
COMMENTS
The sequence is always extended with the smallest positive integer not yet present that doesn't lead to a contradiction.
No digit 0 is present in the sequence (as 0, being even, would block it).
LINKS
PROG
(PARI) See Links section.
CROSSREFS
Cf. A342042, A342044, A342045, A342046 and A342047 (variations on the same idea).
Sequence in context: A276676 A077805 A344539 * A351997 A104662 A333861
KEYWORD
base,nonn
AUTHOR
Eric Angelini, Feb 26 2021
STATUS
approved