A251105 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the maximum of its diagonal elements greater than the absolute difference of its antidiagonal elements

37, 810, 19131, 667626, 39326009, 3656310083, 543468953142, 122617016954321, 44433300409434889, 25181325286832387856, 22702415402871389597941, 31991916656589876360409366, 71117605661273126240891959493

Offset

1,1

Comments

Diagonal of A251113

Links

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

Example

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

Crossrefs

Sequence in context: A211834 A216439 A333065 * A144511 A028225 A028223

Adjacent sequences: A251102 A251103 A251104 * A251106 A251107 A251108

Keyword

nonn

Author

R. H. Hardin, Nov 30 2014

Status

approved