A254506 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2703, 12324, 68832, 356061, 1731335, 8282251, 38770022, 178707667, 815255701, 3683796336, 16525980573, 73671578242, 326677241389, 1441862858957, 6338127433805, 27761171502804, 121206014851274, 527673136282231

Offset

1,1

Comments

Column 2 of A254512

Links

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

Example

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

Crossrefs

Sequence in context: A333130 A214016 A254513 * A254813 A358430 A270542

Adjacent sequences: A254503 A254504 A254505 * A254507 A254508 A254509

Keyword

nonn

Author

R. H. Hardin, Jan 31 2015

Status

approved