A232698 - OEIS

A232698

Number of tilings of an 8 X n rectangle with 2n tetrominoes of any shape.

1, 1, 25, 997, 40899, 800290, 22483347, 657253434, 19077209438, 517312744806, 14571957312254, 412240433359025, 11632857444709188, 326275845576101452, 9187549952207915190, 258821654387452112268, 7288072624408347082481, 205113474464891986564786

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..300

S. Butler, J. Ekstrand, S. Osborne, TETRIS Tiling, AMS Spring Central Sectional, Iowa State University, April 27-28 2013

Wikipedia, Tetromino

CROSSREFS

Cf. A174248, A232684, A232722.

Column k=8 of A230031.

Sequence in context: A218230 A219060 A218316 * A139163 A367974 A167257

Adjacent sequences: A232695 A232696 A232697 * A232699 A232700 A232701

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Nov 27 2013

STATUS

approved