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!)
A251159 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having the maximum of its diagonal elements greater than the absolute difference of its antidiagonal elements 0
96, 5054, 231618, 12191612, 1203787298, 190531611192, 50643184293432, 19416483125259158, 12122837536950012216, 11807644473938508493957, 18430004981764028431520387 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251167

LINKS

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

EXAMPLE

Some solutions for n=2

..0..1..1....1..2..3....1..0..2....1..0..3....0..3..3....0..2..2....0..3..3

..0..0..1....0..0..1....2..0..0....1..0..3....0..0..2....2..0..1....1..0..3

..1..1..0....3..2..1....3..2..0....3..1..0....1..0..0....3..3..2....3..1..0

CROSSREFS

Sequence in context: A035809 A111730 A017759 * A004392 A229585 A093296

Adjacent sequences:  A251156 A251157 A251158 * A251160 A251161 A251162

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

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 3 15:06 EST 2021. Contains 349463 sequences. (Running on oeis4.)