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%I #9 Feb 07 2017 17:26:05
%S 1,62,8342,1269900,198253934,31111319376,4887323351972,
%T 767919868804309,120664440361104580,18960353496615710993,
%U 2979300461790704311162,468147088780110777732830,73561466714064126023807694,11558951424929920406557632356,1816295465197137076501207582877
%N Number of tilings of a 5 X 3n rectangle using 5n trominoes of any shape.
%H Alois P. Heinz, <a href="/A233340/b233340.txt">Table of n, a(n) for n = 0..400</a>
%H Alois P. Heinz, <a href="/A233340/a233340.txt">G.f. for A233340</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Tromino">Tromino</a>
%F G.f.: see link above.
%Y Trisection of column k=5 of A233320.
%K nonn
%O 0,2
%A _Alois P. Heinz_, Dec 07 2013
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