A334050 Lexicographically earliest sequence of distinct positive integers such that the concatenation of any four successive digits forms a prime.

1, 2, 3, 7, 19, 31, 9, 13, 73, 33, 137, 39, 311, 93, 11, 931, 91, 37, 331, 373, 313, 733, 191, 3733, 319, 1373, 3137, 333, 1913, 739, 3119, 337, 193, 119, 3191, 3739, 31193, 371, 933, 71, 9311, 9319, 13733, 13739, 31913, 7331, 913, 7333, 19137, 393, 1193, 3719, 3371, 9337, 1931, 1933, 719, 3373

Offset

1,2

Links

Jean-Marc Falcoz, Table of n, a(n) for n = 1..500

Example

The first terms 1, 2, 3, 7, 19, 31, 9,... form (when 4 successive digits are concatenated) the prime numbers 1237, 2371, 3719, 7193, 1931, 9319, ...

Crossrefs

Cf. A091633, A337613 (same idea, 2 successive digits), A337614 (3 successive digits).

Sequence in context: A038935 A214627 A354215 * A073640 A174568 A005382

Adjacent sequences: A334047 A334048 A334049 * A334051 A334052 A334053

Keyword

base,nonn

Author

Eric Angelini and Jean-Marc Falcoz, Sep 06 2020

Status

approved