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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A185478 Number of (n+1)X(n+1) binary arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant 0
0, 148, 4740, 431655, 92026207, 51354095605, 70588969710949, 246617622494198862, 2154931835018459820138, 47474118606355438067066326 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A185487

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for 3X3

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

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

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

CROSSREFS

Sequence in context: A224055 A224308 A224372 * A210159 A252770 A035822

Adjacent sequences:  A185475 A185476 A185477 * A185479 A185480 A185481

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 28 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 December 8 09:32 EST 2019. Contains 329862 sequences. (Running on oeis4.)