login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A247113 Number of tilings of a 9 X 4n rectangle with 9n tetrominoes of any shape. 2
1, 179399, 517312744806, 2045387873615550415, 8355513115448789147187273, 34243737232278596352691552132065, 140387532129057613906130882433658669281, 575558645377903777492614229836093710424726422, 2359673678366714374809214450385908918997931183691473 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..40

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

R. S. Harris, Counting Polyomino Tilings

Wikipedia, Tetris

Wikipedia, Tetromino

CROSSREFS

Quadrisection of column k=9 of A230031.

Sequence in context: A254808 A253817 A056748 * A186062 A258562 A204787

Adjacent sequences:  A247110 A247111 A247112 * A247114 A247115 A247116

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Nov 19 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 1 09:53 EDT 2020. Contains 334762 sequences. (Running on oeis4.)