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%I #7 Oct 01 2023 02:19:21
%S 1,20,265,2960,30301,295340,2795905,25996520,238988101,2181067460,
%T 19810829545,179385327680,1620996705901,14628147660380,
%U 131888407103185,1188406175868440,10704118783463701,96387848642218100
%N Expansion of 1/((1-2x)(1-3x)(1-6x)(1-9x)).
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (20, -135, 360, -324).
%F a(n) = -6^(n+1)-2^(n+1)/7 +3^(n+1)/2 +9^(n+2)/14. - _R. J. Mathar_, Jun 04 2013
%K nonn
%O 0,2
%A _N. J. A. Sloane_.
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