A254797 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 10484, 133628, 1075560, 11392932, 96309005, 434785178, 3136187330, 30303543958, 234245367914, 877645445528, 6616981844884, 66980680958670, 530577573194491

Offset

1,1

Comments

Diagonal of A254804

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Sequence in context: A247932 A090007 A344305 * A254837 A254560 A257182

Adjacent sequences: A254794 A254795 A254796 * A254798 A254799 A254800

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved