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A257190 Number of (2+2) X (n+2) 0..1 arrays with every 3 X 3 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, vertically and ne-to-sw antidiagonally. 1
2642, 10925, 47283, 220126, 1006996, 4613955, 21367247, 98911734, 458586500, 2132449553, 9926655163, 46235660410, 215513433328, 1005039527604, 4688140595267, 21872823325681, 102063694534105, 476294012358476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A257189.

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Cf. A257189.

Sequence in context: A157609 A249462 A257183 * A254983 A235676 A235446

Adjacent sequences:  A257187 A257188 A257189 * A257191 A257192 A257193

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 17 2015

STATUS

approved

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Last modified July 30 21:33 EDT 2021. Contains 346365 sequences. (Running on oeis4.)