A064184 - OEIS

%I #5 Apr 30 2014 01:38:49

%S 1,1,1,1,2,3,14,69,2338,270825,1546051598,706593182981475,

%T 2673049418728144394217734,3191384003253515767044930785193578829525,

%U 20884425143442468474684561246519089172344375280349724305463253298

%N Denominator of sequence defined by recursion c(n)=1+c(n-2)/c(n-1), c(0)=0, c(1)=1.

%F a(n) = (a(n-1) * a(n-4) + a(n-2)^2) * a(n-2) /a(n-4).

%F a(n) = A066356(n-1) * a(n-2).

%o (PARI) {a(n) = if( n<4, n>=0, (a(n-1) * a(n-4) + a(n-2)^2) * a(n-2) / a(n-4))}

%Y Cf. A066356.

%K nonn,easy

%O 0,5

%A _Michael Somos_, Dec 21 2001