A258512 Number of (2+2)X(n+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

2679, 12156, 62096, 323360, 1679437, 8808509, 46808032, 249458709, 1329091938, 7084847050, 37787407796, 201578866675, 1075312939647, 5736143991522, 30599214721171, 163230926279393, 870747176092202, 4644930836233438

Offset

1,1

Comments

Row 2 of A258511

Links

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

Example

Some solutions for n=3
..1..1..1..1..0....0..1..0..1..1....0..1..1..0..0....0..0..1..0..0
..1..1..1..1..1....1..1..0..0..1....0..0..0..0..0....0..1..1..0..1
..0..1..1..0..0....0..0..0..0..1....0..0..0..0..0....0..1..0..0..0
..1..1..1..0..0....0..0..1..1..0....0..0..1..1..1....1..0..0..0..0

Crossrefs

Cf. A258511

Sequence in context: A345569 A345825 A258505 * A254992 A252210 A252203

Adjacent sequences: A258509 A258510 A258511 * A258513 A258514 A258515

Keyword

nonn

Author

R. H. Hardin, Jun 01 2015

Status

approved