A236885 Number of (n+1) X (n+1) 0..2 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2 X 2 subblock equal.

81, 975, 22393, 1107653, 95406881, 18882502861, 5930319470993, 4826668916366649, 5602584763152248073, 19536887913580369729045

Offset

1,1

Comments

Diagonal of A236893.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A236893.

Sequence in context: A205047 A086580 A206269 * A205729 A237226 A237159

Adjacent sequences: A236882 A236883 A236884 * A236886 A236887 A236888

Keyword

nonn

Author

R. H. Hardin, Feb 01 2014

Status

approved