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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. 8
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 28 20:03 EDT 2021. Contains 347717 sequences. (Running on oeis4.)