NEW SEQ?

Ron Knott ron at ronknott.com
Sat Mar 18 16:59:17 CET 2006


The series appears to be a simple tranformation of the Golden String or Infinite Fibonacci Word
A003849 (A005614 and A004641 etc)
In A003849, after the initial 0,  the transformation [100 -> 1110, 110 -> 110] seems to give your sequence Zak
Ron Knott

>Rows of Binary Sequences
>
>We start with any seed sequence
>(of any length and structure), e.g.:
>{0,1}
>
>and proceed:
>{0,1,1}
>{0,1,1,1,0,1}
>{0,1,1,1,0,1,1,0,1,1,0,1,1}
>{0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1}
>{0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0
>,1,1,1,0,1,1,0,1,1,0,1,1}
>.......................................................
>
>The rule is 
>"Put in  the (binary) sum of neighbors between them!":
>{0,0}=>{0,0,0},{0,1}=>{0,1,0},
>{1,0}=>{0,1,0},{1,1}=>{1,1,0,1}.
>
>My Q's:
>1. Is it known?
>1a. If yes, please give Ref/Cf.
>1b. If not:
>2. Is it interesting?
>2a. If yes, what can be said about patterns, cycles,
>dependence on seeds etc.
>2b. If not, please ignore it.
>Thanks, Zak
>
>PS. In case of anyone interested, here's (raw but
>working Mmca):
>s={0,1};s2=s;Print[s2];Do[j=1;Do[si1={s[[i]],s[[i+1]]};in=Which[si1≈ó{0,0},0,si1≈ó{0,1},1,si1≈ó{1,0},1,si1≈ó{1,1},{1,0
>}];
>s2=Insert[s2,in,i+j];j++,{i,1,Length[s]-1}];
>s2=Flatten[s2];Print[s2];s=s2,{5}]
>{0,1}
>{0,1,1}
>{0,1,1,1,0,1}
>{0,1,1,1,0,1,1,0,1,1,0,1,1}
>{0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1}
>{0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,1,0,1,1,0,1,1,0,1,1,1,0,1,1,0
>,1,1,1,0,1,1,0,1,1,0,1,1}
>
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