A237952 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the upper median plus the lower median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

256, 1280, 6400, 34560, 186624, 1022976, 5607424, 30916608, 170459136, 939196416, 5174788096, 28562620416, 157653467136, 868872880128, 4788604370944, 26432558333952, 145904753442816, 804133590269952, 4431869529554944

Offset

1,1

Comments

Column 1 of A237956

Links

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

Formula

Empirical: a(n) = 976*a(n-4) -46848*a(n-8) +110592*a(n-12)

Example

Some solutions for n=5
..0..0....2..1....2..2....0..0....1..0....0..1....0..3....0..2....0..3....2..2
..0..1....1..1....3..1....2..3....3..3....2..2....2..1....3..1....1..1....2..1
..0..1....2..2....3..0....0..1....0..2....0..2....1..3....3..0....2..0....3..2
..0..0....0..3....3..2....2..2....3..2....3..2....3..1....0..3....1..2....2..0
..0..0....1..2....2..0....1..1....1..0....3..0....3..0....2..0....1..0....1..3
..1..0....0..2....3..1....1..2....3..3....3..1....2..1....2..0....0..2....2..1

Crossrefs

Sequence in context: A237956 A237241 A120054 * A237235 A129539 A113877

Adjacent sequences: A237949 A237950 A237951 * A237953 A237954 A237955

Keyword

nonn

Author

R. H. Hardin, Feb 16 2014

Status

approved