%I A010908
%S A010908 4,21,110,576,3016,15792,82688,432960,2267008,11870208,
%T A010908 62153216,325438464,1704017920,8922353664,46718050304,244618887168,
%U A010908 1280841121792,6706571182080,35116062605312,183870090903552
%N A010908 Pisot sequence E(4,21), a(n)=[ a(n-1)^2/a(n-2)+1/2 ].
%D A010908 D. W. Boyd, Some integer sequences related to the Pisot sequences, Acta 
               Arithmetica, 34 (1979), 295-305.
%D A010908 D. W. Boyd, Linear recurrence relations for some generalized Pisot sequences, 
               Advances in Number Theory ( Kingston ON, 1991) 333-340, Oxford Sci. 
               Publ., Oxford Univ. Press, New York, 1993.
%Y A010908 Sequence in context: A083425 A100237 A117381 this_sequence A136786 A026335 
               A027909
%Y A010908 Adjacent sequences: A010905 A010906 A010907 this_sequence A010909 A010910 
               A010911
%K A010908 nonn
%O A010908 0,1
%A A010908 Simon Plouffe (simon.plouffe(AT)gmail.com)