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A225335 A continuous "look-and-repeat" sequence (seed 3). 0

%I #14 Jan 19 2019 04:15:43

%S 3,1,1,3,2,2,1,1,1,3,2,2,2,3,3,1,1,1,3,3,3,2,2,2,3,3,3,1,3,3,3,3,3,2,

%T 3,3,3,1,1,1,5,5,3,1,1,2,3,3,3,3,3,1,2,2,5,1,1,3,2,2,1,1,1,2,5,5,3,1,

%U 1,1,2,2

%N A continuous "look-and-repeat" sequence (seed 3).

%C The 'look-and-repeat' sequence A225330, with seed 3. The variant A225331 with the same seed 3 gives this same sequence.

%C It describes at each step the preceding digits by repeating the frequency number.

%C The sequence is determined by triples of digits. The first two terms of a triple are the repeated frequency and the last term is the digit.

%C a(n) is always equal to 1, 2, 3, or 5. No series of four identical digits happens in the sequence, nor any of five 5's.

%C Applying the look-and-repeat principle to the sequence itself, it is simply shift one rank to the left.

%e a(1) = 3, you then see "one 3" and repeating "one", a(2) = a(3) = 1 (one) and a(4) = 3; you have then two 1's, so 2,2,1 ; then one 3, so 1,1,3, etc.

%Y Cf. A225330, A225331 (two variants with seed 1), A225331 (seed 2), A225329, A225333, A225334 (look-and-repeat by block with resp. seed 1, seed 2, seed 3).

%Y Cf. A005150 (original look-and-say), A225224, A221646, A225212 (continuous look-and-say versions).

%K nonn,easy

%O 1,1

%A _Jean-Christophe Hervé_, May 12 2013

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)