A251309 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the maximum of its diagonal elements greater than the absolute difference of its antidiagonal elements

10, 79, 890, 16006, 451826, 20080487, 1401489913, 153420339471, 26520184876394, 7212082506701341, 3095565630909130451, 2090970229906057682594, 2228353475131985328672710, 3744199174821109524081657694

Offset

1,1

Comments

Diagonal of A251317

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A006329 A077245 A036732 * A206764 A253649 A244729

Adjacent sequences: A251306 A251307 A251308 * A251310 A251311 A251312

Keyword

nonn

Author

R. H. Hardin, Dec 01 2014

Status

approved