A028131 - OEIS

%I #14 Aug 08 2019 18:30:37

%S 1,26,429,5746,68285,751842,7859293,79189682,776807229,7469674498,

%T 70755237917,662574315858,6150105857533,56698559685794,

%U 519954841569501,4748676612377074,43230125518942397,392566127341918530

%N Expansion of 1/((1-4x)(1-6x)(1-7x)(1-9x)).

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (26,-247,1014,-1512).

%F a(n) = (9^(n+3)-5*7^(n+3)+5*6^(n+3)-4^(n+3))/30. - _Yahia Kahloune_, Jun 02 2013

%t CoefficientList[Series[1/((1-4x)(1-6x)(1-7x)(1-9x)),{x,0,30}],x] (* _Harvey P. Dale_, Jan 20 2019 *)

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_.