A258523 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 16473, 523716, 6505920, 65947572, 592438330, 6279181504, 90536765981, 940469384118, 13154653966188, 268158250039108, 2752663543823279, 39677268013710316, 3474369295264994411, 23501492053909210974

Offset

1,1

Comments

Diagonal of A258530

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for n=2
..0..1..0..1....0..0..1..0....1..0..0..0....1..0..1..0....0..0..1..0
..1..1..1..1....1..0..0..0....0..1..1..1....0..1..0..1....0..0..1..1
..1..0..1..0....1..0..0..1....1..1..0..1....0..1..0..0....1..0..1..0
..1..0..1..0....0..1..1..1....0..0..1..1....1..1..1..0....1..1..0..1

Crossrefs

Cf. A258530

Sequence in context: A200791 A254812 A329894 * A257147 A254579 A195657

Adjacent sequences: A258520 A258521 A258522 * A258524 A258525 A258526

Keyword

nonn

Author

R. H. Hardin, Jun 02 2015

Status

approved