A152609 a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that the concatenation of any four consecutive digits in the sequence is a prime.

1, 2, 3, 7, 19, 31, 91, 373, 931, 1931, 1933, 7193, 11931, 19311, 93119, 311931, 913733, 1373313, 7331373, 9311931, 19311931, 19311933, 71931193, 119311931, 193119311, 931193119, 3119311931, 9137331373, 9311931193

Offset

1,2

Comments

Computed by Jean-Marc Falcoz.

Links

Table of n, a(n) for n=1..29.

Eric Angelini, Chiffres consecutifs dans quelques suites

E. Angelini, Chiffres consecutifs dans quelques suites [Cached copy, with permission]

Crossrefs

Cf. A158652, A152604-A152609.

Sequence in context: A113165 A128025 A092064 * A298943 A340281 A172461

Adjacent sequences: A152606 A152607 A152608 * A152610 A152611 A152612

Keyword

nonn,base

Author

N. J. A. Sloane, Sep 23 2009

Status

approved