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!)
A291806 The number of polyomino tilings of n X n square. 7
1, 5, 216, 212987 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The sequence gives the number of distinct tilings by polyominoes of a square with side n. As for "free" polyominoes, tilings that are reflections or rotations of each other are not considered distinct.

Using the same terminology used for polyominoes: the corresponding sequence for "fixed" tilings is 1,12,1434,1691690, and for one-sided tilings is 1,5,222,213315.

LINKS

Table of n, a(n) for n=1..4.

John Mason, Tiling examples

CROSSREFS

Cf. A268416 (polyominoes that will fit in n-sided square), A291807 (symmetric tilings), A291808 (tilings with distinct polyominoes), A291809 (tilings with differently sized polyominoes).

Sequence in context: A144796 A269823 A206457 * A119657 A235456 A159808

Adjacent sequences:  A291803 A291804 A291805 * A291807 A291808 A291809

KEYWORD

nonn,more

AUTHOR

John Mason, Sep 01 2017

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 November 28 08:12 EST 2021. Contains 349401 sequences. (Running on oeis4.)