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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205887 Number of (n+1)X(n+1) 0..2 arrays with 2X2 subblock determinants differing from horizontal neighbors and permanents differing from vertical neighbors 0
81, 6020, 1476942, 1076391970, 2458450081192, 17941121077647948 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205894

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=3

..1..2..2..2....1..1..2..1....2..1..0..2....2..1..0..0....1..0..2..1

..0..1..0..2....1..0..1..2....1..2..2..1....0..2..1..2....2..2..2..0

..2..1..1..2....0..2..1..2....1..0..2..2....1..2..1..0....2..1..2..2

..2..1..2..0....0..2..2..2....0..1..0..0....1..2..2..1....1..0..0..1

CROSSREFS

Sequence in context: A060349 A212706 A036354 * A205199 A250612 A228974

Adjacent sequences:  A205884 A205885 A205886 * A205888 A205889 A205890

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 01 2012

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 4 13:06 EST 2021. Contains 349526 sequences. (Running on oeis4.)