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A257183 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, vertically and ne-to-sw antidiagonally 1
2642, 10925, 44795, 213631, 991554, 4507765, 20935219, 97650228, 454044178, 2115208441, 9867664386, 46031851480, 214761098143, 1002223496523, 4677320684206, 21829236904579, 101881854293960, 475514395215723 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A257189

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Cf. A257189

Sequence in context: A253040 A157609 A249462 * A257190 A254983 A235676

Adjacent sequences:  A257180 A257181 A257182 * A257184 A257185 A257186

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 17 2015

STATUS

approved

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Last modified May 28 12:31 EDT 2020. Contains 334681 sequences. (Running on oeis4.)