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!)
A186054 Number of (n+2)X(n+2) binary arrays with each 3X3 subblock having a positive determinant 0
87, 1217, 26868, 836891, 58408337, 6541274560, 1130708781343, 404252413909581, 239686988190497117, 224842795740772389253, 420525789504469841741415 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A186063

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for 4X4

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

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

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

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

CROSSREFS

Sequence in context: A294907 A093287 A231218 * A082955 A201154 A171344

Adjacent sequences:  A186051 A186052 A186053 * A186055 A186056 A186057

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 11 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 31 11:50 EDT 2020. Contains 338101 sequences. (Running on oeis4.)