A236811 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock equal

81, 1791, 98380, 14757359, 5737086630, 6170884344818, 17618985802053806, 134095020019313452963

Offset

1,1

Comments

Diagonal of A236819

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A328683 A236057 A205910 * A206669 A223206 A296650

Adjacent sequences: A236808 A236809 A236810 * A236812 A236813 A236814

Keyword

nonn

Author

R. H. Hardin, Jan 31 2014

Status

approved