A122512 - OEIS

%I #13 Oct 02 2023 10:45:25

%S 1,0,1,2,0,4,3,2,11,4,12,24,9,44,45,38,124,84,155,294,199,520,632,624,

%T 1473,1368,2089,3690,3352,6500,8643,9514,18291,20300,28676,47368,

%U 50985,84420,117045,139022,234900,288692,395899,619470,738383,1122576,1581424

%N Expansion of 1/(1 - x^2 - 2 x^3 + x^4).

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0, 1, 2, -1).

%t CoefficientList[Series[1/(1-x^2-2 x^3+x^4),{x,0,70}],x]  (* _Harvey P. Dale_, Mar 31 2011 *)

%K nonn

%O 0,4

%A _Roger L. Bagula_, Sep 16 2006

%E Edited by _N. J. A. Sloane_, Sep 17 2006

%E Values from a(2) onward corrected. - _R. J. Mathar_, Aug 02 2008