A254768 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and the central column and the two medians of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 11321, 295516, 14533460, 1209604111, 208503958572, 66029963150922, 36926711851435570, 39182636472055684103, 75157581979007926362907, 260790701639951359653998352

Offset

1,1

Comments

Diagonal of A254775

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A288776 A200844 A254475 * A254504 A253812 A256947

Adjacent sequences: A254765 A254766 A254767 * A254769 A254770 A254771

Keyword

nonn

Author

R. H. Hardin, Feb 07 2015

Status

approved