login
This site is supported by donations to The OEIS Foundation.

 

Logo

Many excellent designs for a new banner were submitted. We will use the best of them in rotation.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056785 Number of polydominoes. 7
1, 4, 23, 211, 2227, 25824, 310242, 3818983, 47752136 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

From Vicher's table.

This counts the number of polyominoes of order 2n that can be tiled by dominoes in at least one way. - Joseph Myers, Jun 10 2012

LINKS

Table of n, a(n) for n=1..9.

M. Keller, Counting Polyforms

M. Vicher, Polyforms

Index entries for sequences related to dominoes

CROSSREFS

Cf. A056786, A213376, A213377, A213378.

Sequence in context: A222454 A099869 A221371 * A188404 A105747 A099692

Adjacent sequences:  A056782 A056783 A056784 * A056786 A056787 A056788

KEYWORD

hard,more,nonn

AUTHOR

James A. Sellers, Aug 28 2000

EXTENSIONS

Edited by T. D. Noe, Apr 09 2009

Offset corrected and a(6)-a(9) added by Joseph Myers, Jun 10 2012

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified April 19 21:10 EDT 2014. Contains 240777 sequences.