login
A192339
Coefficient of x in the reduction of n-th polynomial at A157751 by x^2->x+2.
1
0, 1, 3, 11, 37, 125, 415, 1371, 4501, 14725, 48031, 156355, 508197, 1649933, 5352255, 17351563, 56226389, 182134837
OFFSET
1,3
COMMENTS
For an introduction to reductions of polynomials by substitutions such as x^2->x+2, see A192232.
FORMULA
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]
MATHEMATICA
(See A192338.)
CROSSREFS
Sequence in context: A134757 A094977 A263986 * A027064 A027066 A291415
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jun 28 2011
STATUS
approved