A253359 Number of (n+2)X(n+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum unequal to its neighbors horizontally and vertically

152, 424, 2992, 8904, 76840, 520888, 3424264, 51091912, 419412744, 7851859992, 129001341576, 2610211824392, 74937102784072, 2289774714913976, 95246926549138760, 4450320900209044904, 292794743504841115272

Offset

1,1

Comments

Diagonal of A253367

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

Some solutions for n=4
..0..1..0..0..0..1....0..1..1..0..1..1....0..0..0..0..1..0....1..1..1..0..1..0
..1..0..1..0..1..1....0..1..1..1..0..1....0..1..0..1..0..0....0..1..1..1..1..1
..0..0..0..0..0..1....1..0..1..0..1..1....0..0..0..0..1..0....1..0..1..0..1..0
..1..0..1..0..1..0....1..1..1..1..0..1....0..1..0..1..0..0....1..1..1..1..1..1
..0..1..0..0..0..1....1..0..1..0..1..1....0..0..0..0..0..0....1..0..1..0..1..1
..0..0..1..0..1..0....0..1..0..1..0..0....0..1..0..1..0..1....0..1..1..1..0..1

Crossrefs

Sequence in context: A038857 A137632 A259740 * A226365 A085775 A208492

Adjacent sequences: A253356 A253357 A253358 * A253360 A253361 A253362

Keyword

nonn

Author

R. H. Hardin, Dec 30 2014

Status

approved