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 A192813 Coefficient of x in the reduction of the polynomial x^(2n)+x^n+1 by x^3->x+1. 1
 0, 1, 1, 3, 4, 6, 11, 18, 31, 53, 91, 158, 274, 477, 832, 1453, 2541, 4447, 7788, 13646, 23919, 41938, 73547, 129001, 226295, 397006, 696546, 1222153, 2144464, 3762921, 6603001, 11586843, 20332676, 35680278, 62613091, 109876418, 192817159 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS For discussions of polynomial reduction, see A192232 and A192744. LINKS Index entries for linear recurrences with constant coefficients, signature (2,0,0,-1,0,-1). FORMULA a(n)=2*a(n-1)-a(n-4)-a(n-6). G.f.: -x^2*(x^4+2*x^3-x^2+x-1)/((x^3-x^2+2*x-1)*(x^3+x^2-1)). [Colin Barker, Nov 23 2012] MATHEMATICA (See A192812.) CROSSREFS Cf. A192744, A192232, A192812. Sequence in context: A069825 A093040 A022935 * A048229 A002090 A199970 Adjacent sequences:  A192810 A192811 A192812 * A192814 A192815 A192816 KEYWORD nonn,easy AUTHOR Clark Kimberling, Jul 10 2011 STATUS approved

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