Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #4 Dec 02 2012 18:33:46
%S 1,0,569,26676,3962734,342302244,37873593799,3704964324320,
%T 385840008972355,38896105985522272,3988620629294917699,
%U 405324462894583579568,41388678831664101508625,4215380264404938792346540,429927047644440948315400804,43815601312259648266416292348
%N Number of tilings of a 9 X n rectangle using dominoes and right trominoes.
%H Alois P. Heinz, <a href="/A219992/b219992.txt">Table of n, a(n) for n = 0..200</a>
%Y Column k=9 of A219987.
%K nonn
%O 0,3
%A _Alois P. Heinz_, Dec 02 2012