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%I #22 Feb 07 2017 17:11:07
%S 1,1,25,997,40899,800290,22483347,657253434,19077209438,517312744806,
%T 14571957312254,412240433359025,11632857444709188,326275845576101452,
%U 9187549952207915190,258821654387452112268,7288072624408347082481,205113474464891986564786
%N Number of tilings of an 8 X n rectangle with 2n tetrominoes of any shape.
%H Alois P. Heinz, <a href="/A232698/b232698.txt">Table of n, a(n) for n = 0..300</a>
%H S. Butler, J. Ekstrand, S. Osborne, <a href="/A230031/a230031.pdf">TETRIS Tiling</a>, AMS Spring Central Sectional, Iowa State University, April 27-28 2013
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Tetromino">Tetromino</a>
%Y Cf. A174248, A232684, A232722.
%Y Column k=8 of A230031.
%K nonn
%O 0,3
%A _Alois P. Heinz_, Nov 27 2013