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!)
A254983 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally and vertically 1
2642, 12866, 56002, 273707, 1301410, 6027037, 28125597, 131242928, 611072260, 2847429072, 13277358450, 61913782538, 288771045558, 1347220992022, 6286065956155, 29332988038173, 136888663584706, 638853142958977 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A254989

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Cf. A254989

Sequence in context: A249462 A257183 A257190 * A235676 A235446 A235750

Adjacent sequences:  A254980 A254981 A254982 * A254984 A254985 A254986

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 11 2015

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 13 22:55 EST 2019. Contains 329974 sequences. (Running on oeis4.)