A237863 Number of (n+1)X(3+1) 0..2 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

1414, 11454, 95470, 811498, 6710651, 55582616, 466228162, 3923377300, 32640488162, 271793432028, 2276818267492, 19078882880296, 159120721843014, 1327754678683016, 11110560232889918, 92946946885743656, 776064525722366116

Offset

1,1

Comments

Column 3 of A237868

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A204741 A237742 A143192 * A263671 A207046 A237220

Adjacent sequences: A237860 A237861 A237862 * A237864 A237865 A237866

Keyword

nonn

Author

R. H. Hardin, Feb 14 2014

Status

approved