A251011 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the maximum of its antidiagonal elements

63, 6653, 4006992, 13508173078, 254604954671538, 26881736550623664594, 15886176013807764828256390, 52561086204509370088955346390030, 973565980065757968304861029019267809746

Offset

1,1

Comments

Diagonal of A251019

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A046190 A296782 A292782 * A234616 A093263 A069433

Adjacent sequences: A251008 A251009 A251010 * A251012 A251013 A251014

Keyword

nonn

Author

R. H. Hardin, Nov 29 2014

Status

approved