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%I #4 Dec 01 2012 19:40:07
%S 1,0,16,0,560,384,46824,253952,5141408,44013568,628801280,6441106368,
%T 81395792936,898467518528,10813539098984,123094927843072,
%U 1452323503655432,16743873126866752,195934939996794440,2270867565108570304,26483057736012701952
%N Number of tilings of a 9 X n rectangle using right trominoes and 2 X 2 tiles.
%H Alois P. Heinz, <a href="/A219950/b219950.txt">Table of n, a(n) for n = 0..300</a>
%Y Column k=9 of A219946.
%K nonn
%O 0,3
%A _Alois P. Heinz_, Dec 01 2012