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A254888 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally and vertically 1
2540, 8944, 35296, 149931, 516726, 1662439, 5009638, 14250367, 38915696, 101553961, 257394529, 637368852, 1541978175, 3659178294, 8544065101, 19675806469, 44760978714, 100769983174, 224782052971, 497397948395 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A254894

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A334932 A254021 A254014 * A248997 A234407 A135924

Adjacent sequences:  A254885 A254886 A254887 * A254889 A254890 A254891

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 10 2015

STATUS

approved

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Last modified June 1 03:14 EDT 2020. Contains 334758 sequences. (Running on oeis4.)