A253814 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A253814

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally and vertically

2700, 12992, 60392, 181070, 651937, 2008068, 7125170, 23696686, 83201751, 284492002, 989245744, 3404806015, 11765494893, 40505747884, 139520863174, 479991310053, 1651051052299, 5677350741360, 19519625917475, 67108356622603

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 2 of A253820

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A322525 A254805 A254798 * A054561 A230752 A364795

Adjacent sequences: A253811 A253812 A253813 * A253815 A253816 A253817

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 14 2015

STATUS

approved