%I A000816
%S A000816 0,2,40,1952,177280,25866752,5535262720,1633165156352,635421069967360,
%T A000816 315212388819402752,194181169538675507200,145435130631317935357952,
%U A000816 130145345400688287667978240,137139396592145493713802493952
%N A000816 Expansion of sin^2 x /cos 2x.
%H A000816 R. J. Mathar, <a href="b000816.txt">Table of n, a(n) for n = 1..200</
               a>
%F A000816 1/2 * A002436(n+1), n>0. - R. Stephan, Mar 09 2004
%Y A000816 Cf. A000819, A000822, A000828, A003707, A009125, A009569.
%Y A000816 Equals 2^(2n-1) * A000364(n).
%Y A000816 Sequence in context: A012241 A099707 A163826 this_sequence A000819 A060079 
               A052502
%Y A000816 Adjacent sequences: A000813 A000814 A000815 this_sequence A000817 A000818 
               A000819
%K A000816 nonn
%O A000816 0,2
%A A000816 N. J. A. Sloane (njas(AT)research.att.com).