login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


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 June 21 00:57 EDT 2021. Contains 345329 sequences. (Running on oeis4.)