%I #11 Oct 01 2023 12:23:42
%S 1,1,2,2,4,6,3,9,12,4,16,20,5,25,30,6,36,42,7,49,56,8,64,72,9,81,90,
%T 10,100,110,11,121,132,12,144,156,13,169,182,14,196,210,15,225,240,16,
%U 256,272,17,289,306,18,324,342,19,361,380,20,400,420
%N Expansion of (1 + x + 2*x^2 - x^3 + x^4)/(1 - 3*x^3 + 3*x^6 - x^9).
%H <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 3, 0, 0, -3, 0, 0, 1).
%o (PARI) Vec((1 + x + 2*x^2 - x^3 + x^4)/(1 - 3*x^3 + 3*x^6 - x^9) + O(x^60)) \\ _Michel Marcus_, Mar 06 2020
%K nonn
%O 0,3
%A _N. J. A. Sloane_
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