A238073 - OEIS

A238073

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

256, 14456, 1781008, 336372000, 182752988334, 220851136586828, 747061315866664736, 5370193055761518144212

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OFFSET

1,1

COMMENTS

Diagonal of A238081

LINKS

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

EXAMPLE

Some solutions for n=2

..2..3..2....3..2..0....3..0..2....2..2..0....1..1..1....0..3..3....1..2..3

..1..3..2....1..0..1....2..1..2....0..2..3....3..2..1....2..1..3....2..3..3

..0..1..1....1..2..3....3..1..1....1..3..1....0..3..3....2..3..0....3..2..1

CROSSREFS

Sequence in context: A205089 A239443 A240932 * A017032 A136286 A269204

Adjacent sequences: A238070 A238071 A238072 * A238074 A238075 A238076

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved