id:A152136 - OEIS Search Results

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a(0) = 0; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that the concatenation of any two consecutive digits in the sequence is a prime.

+0
2

0, 2, 3, 7, 9, 71, 73, 79, 711, 713, 717, 971, 973, 1111, 1113, 1117, 1119, 7111, 7113, 7117, 9711, 9713, 11111, 11113, 11117, 11119, 71111, 71113, 71117, 97111, 97113, 111111, 111113, 111117, 111119, 711111, 711113, 711117, 971111 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A varaint of A152607 suggested by Zak Seidov, Sep 24 2009.` `Computed by Jean-Marc Falcoz.` `Comment from Jean-Marc Falcoz: (Start) The sequence is infinite since it has the following structure:` `9713, 11111, 11113, 11117, 11119, 71111, 71113, 71117, 97111,` `97113, 111111, 111113, 111117, 111119, 711111, 711113, 711117, 971111,` `971113, 1111111, 1111113, 1111117, 1111119, 7111111, 7111113, 7111117, 9711111,` `9711113, 11111111, 11111113, 11111117, 11111119, 71111111, 71111113, 71111117, 97111111,` `97111113, 111111111, 111111113, 111111117, 111111119, 711111111, 711111113, 711111117, 971111111,` `971111113, 1111111111, 1111111113, 1111111117, 1111111119, 7111111111, 7111111113, 7111111117, 9711111111,` `9711111113, ...`
	LINKS	`Eric Angelini, Chiffres consecutifs dans quelques suites`
	CROSSREFS	`Cf. A152607, A158652, A152604-A152609.` `Sequence in context: A123481 A107861 A109800 this_sequence A059180 A051637 A051471` `Adjacent sequences: A152133 A152134 A152135 this_sequence A152137 A152138 A152139`
	KEYWORD	`nonn,base`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Sep 24 2009`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.

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