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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A187936 Number of (n+2)X7 binary arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum 0
3188, 14308, 435194, 7443374, 167909728, 3490809390, 75359054474, 1600390024874, 34388021244382, 736688645134204, 15821989912283976, 339477706692286110 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A187940

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for 4X7

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

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

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

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

CROSSREFS

Sequence in context: A205282 A324634 A115932 * A252367 A250386 A069401

Adjacent sequences:  A187933 A187934 A187935 * A187937 A187938 A187939

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 21 03:24 EDT 2019. Contains 328291 sequences. (Running on oeis4.)