Search: id:A089910
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%I A089910
%S A089910 4,9,12,17,22,25,30,33,38,43,46,51,56,59,64,67,72,77,80,85,88,93,98,101,
%T A089910 106,111,114,119,122,127,132,135,140,145,148,153,156,161,166,169,174,
%U A089910 177,182,187,190,195,200,203,208,211,216,221,224,229,232,237,242,245
%N A089910 Indices n at which blocks (1;1) occur in infinite Fibonacci word; i.e. 
               such that A005614(n)=A005614(n+1)=1.
%F A089910 a(n)=floor((2+sqrt(5))*n)+0 or 1; floor(n*(2+sqrt(5)))+b(a(n))-a(n)=0 
               where b(x) = A078588(x)=x+1+ceil(x*sqrt(5))-2*ceil(x*(1+sqrt(5))/
               2)
%Y A089910 Cf. A001950, A026352.
%Y A089910 Sequence in context: A034019 A034018 A047461 this_sequence A059269 A081619 
               A038109
%Y A089910 Adjacent sequences: A089907 A089908 A089909 this_sequence A089911 A089912 
               A089913
%K A089910 nonn
%O A089910 1,1
%A A089910 Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 15 2003

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