A236801 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal.

81, 1435, 85929, 16530709, 6612746409, 11092792124317, 27385111938746265, 497183007539695570813, 7087061017965887490247401

Offset: 1

Author

R. H. Hardin, Jan 31 2014

Keywords

• nonn

Comments

Diagonal of A236809

Examples

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