A342046 When a digit d is prime, the next digit is > d.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 34, 13, 40, 14, 15, 60, 16, 17, 80, 18, 19, 23, 41, 24, 25, 61, 26, 27, 81, 28, 29, 35, 62, 36, 37, 82, 38, 39, 42, 43, 44, 45, 63, 46, 47, 83, 48, 49, 56, 57, 84, 58, 59, 64, 65, 66, 67, 85, 68, 69, 78, 79, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99

Offset

1,3

Comments

After a(1) = 0, the sequence is always extended with the smallest positive integer not yet present that doesn't lead to a contradiction.

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program for A342046

Prog

(PARI) See Links section.

Crossrefs

Cf. A342042, A342043, A342044, A342045 and A342047 (variations on the same idea).

Sequence in context: A071786 A151766 A004852 * A078546 A262360 A004863

Adjacent sequences: A342043 A342044 A342045 * A342047 A342048 A342049

Keyword

base,nonn

Author

Eric Angelini, Feb 26 2021

Status

approved