A250966 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements

14, 308, 22048, 5089900, 3794909318, 9135168475316, 71001116832347962, 1781714118279963697630, 144355770055582148091515150, 37761829882206405363232456330430, 31892938416369811765366547510541575588

Offset

1,1

Comments

Diagonal of A250973

Links

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

Example

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

Crossrefs

Sequence in context: A251220 A205619 A034912 * A213466 A303488 A341501

Adjacent sequences: A250963 A250964 A250965 * A250967 A250968 A250969

Keyword

nonn

Author

R. H. Hardin, Nov 29 2014

Status

approved