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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A183250 Half the number of nX4 binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies 1
2, 18, 164, 2101, 29100, 417190, 6104168, 90554742, 1356933444, 20489622108, 311268434796, 4751843588209, 72836045462648, 1120231330154058, 17279391496374040, 267199601139845596, 4140858845912841972 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A183253

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..100

EXAMPLE

Some solutions with a(1,1)=0 for 3X4

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

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

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

CROSSREFS

Sequence in context: A037721 A245998 A005260 * A037728 A037623 A052865

Adjacent sequences:  A183247 A183248 A183249 * A183251 A183252 A183253

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 21 11:01 EST 2018. Contains 317447 sequences. (Running on oeis4.)