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%I #7 Nov 13 2012 08:22:41
%S 0,1,3,11,37,125,415,1371,4501,14725,48031,156355,508197,1649933,
%T 5352255,17351563,56226389,182134837
%N Coefficient of x in the reduction of n-th polynomial at A157751 by x^2->x+2.
%C For an introduction to reductions of polynomials by substitutions such as x^2->x+2, see A192232.
%F Empirical G.f.: -x^2*(x+1)*(2*x-1)/((x^2+2*x-1)*(4*x^2+2*x-1)). [_Colin Barker_, Nov 13 2012]
%t (See A192338.)
%Y Cf. , A192232, A192313, A192338.
%K nonn
%O 1,3
%A _Clark Kimberling_, Jun 28 2011
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