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%I #4 Oct 01 2013 17:58:01
%S 1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,
%T 1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,
%U 2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1,1,1,2,2,1,1
%N Denominator of the ratio of the preceding two terms.
%C The actual repeating sequence is 2,1,1/2,1/2,1,2,2,1,1/2,1/2,1,2...
%F Let a(1) = 1, a(2) = 2 then a(n) = a(n-2)/a(n-1) for n = 3, 4, 5... The sequence only posts the denominator of a(n).
%o (PARI) fibdiv(n) = { a = vector(1000); a[1] = 1; a[2] = 2; for(j=3,n, a[j] = a[j-1]/a[j-2]; print1(denominator(a[j])",") ) }
%K nonn,frac
%O 3,3
%A _Cino Hilliard_, Jun 24 2004
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