A254546 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 9292, 129677, 1193965, 8246808, 64180262, 479026957, 2511052025, 21188684994, 181128766926, 982298722361, 8581995931854, 74325711093901, 405810151566882, 3553109063296745

Offset

1,1

Comments

Diagonal of A254553

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A254887 A256896 A254234 * A255028 A247932 A090007

Adjacent sequences: A254543 A254544 A254545 * A254547 A254548 A254549

Keyword

nonn

Author

R. H. Hardin, Feb 01 2015

Status

approved