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 A342042 When a digit d is even, the next digit is > d. 7
 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 30, 13, 14, 50, 15, 16, 70, 17, 18, 90, 19, 23, 24, 51, 25, 26, 71, 27, 28, 91, 29, 31, 32, 33, 34, 52, 35, 36, 72, 37, 38, 92, 39, 45, 46, 73, 47, 48, 93, 49, 53, 54, 55, 56, 74, 57, 58, 94, 59, 67, 68, 95, 69, 75, 76, 77, 78, 96, 79, 89, 97, 98, 99, 101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS The sequence is always extended with the smallest positive integer not yet present that doesn't lead to a contradiction. Conjecture: This contains every nonnegative integer except those in A347298. - N. J. A. Sloane, Aug 26 2021 LINKS Peter Kagey, Table of n, a(n) for n = 1..10000 Rémy Sigrist, PARI program for A342042 PROG (PARI) See Links section. CROSSREFS Cf. A342043, A342044, A342045, A342046 and A342047 (variations on the same idea), A347298. Sequence in context: A039210 A243020 A061921 * A277650 A071786 A151766 Adjacent sequences:  A342038 A342039 A342040 * A342043 A342044 A342045 KEYWORD base,nonn,nice AUTHOR Eric Angelini, Feb 26 2021 STATUS approved

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Last modified September 22 19:36 EDT 2021. Contains 347608 sequences. (Running on oeis4.)