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A258505 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 medians of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
2679, 12156, 56526, 304844, 1627220, 8659189, 46288077, 247098224, 1317234754, 7027083732, 37495141913, 200030678904, 1067066745518, 5692349807117, 30366101605335, 161987364711005, 864111537226175, 4609528214184782 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A258511

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Cf. A258511

Sequence in context: A166513 A345569 A345825 * A258512 A254992 A252210

Adjacent sequences:  A258502 A258503 A258504 * A258506 A258507 A258508

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 01 2015

STATUS

approved

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Last modified July 25 12:15 EDT 2021. Contains 346290 sequences. (Running on oeis4.)