A251047 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements

66, 1528, 10289, 59215, 248803, 1081183, 4118693, 15940227, 57664667, 206905931, 713141125, 2417509205, 7978402597

Offset

1,1

Comments

Diagonal of A251055

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=4
..0..1..1..1..3....0..0..3..0..3....2..0..3..0..3....0..0..1..1..2
..0..0..0..0..0....0..0..3..0..3....2..0..3..0..2....1..0..0..0..0
..1..1..1..1..1....0..0..3..0..2....2..0..3..0..1....2..0..0..0..0
..0..0..0..0..0....0..0..3..0..2....2..0..3..0..1....2..0..0..0..0
..2..2..0..0..0....0..0..3..0..0....3..0..3..0..0....3..1..1..1..1

Crossrefs

Sequence in context: A269693 A278850 A104673 * A279889 A241799 A269498

Adjacent sequences: A251044 A251045 A251046 * A251048 A251049 A251050

Keyword

nonn

Author

R. H. Hardin, Nov 29 2014

Status

approved