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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A189189 Number of nXn binary arrays without the pattern 0 0 1 vertically or antidiagonally 1
2, 16, 316, 15326, 1579664, 367115337, 184841938568, 209311662962608, 525679279319545840, 2979655033608039508606, 37875187935027408625277140, 1087648851912447148168100296827, 70353152136567154798416885107484140 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A189196

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for 3X3

..1..1..1....0..0..0....1..1..0....0..0..1....1..0..1....1..1..1....0..1..0

..0..1..1....1..1..0....1..1..1....1..1..0....0..1..0....0..0..0....1..0..0

..1..0..0....1..0..0....1..1..1....1..1..1....1..1..0....1..0..0....0..1..0

CROSSREFS

Sequence in context: A140051 A223675 A189058 * A188867 A137729 A171212

Adjacent sequences:  A189186 A189187 A189188 * A189190 A189191 A189192

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 18 2011

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 October 25 17:33 EDT 2014. Contains 248557 sequences.