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A238038 Number of (n+1)X(n+1) 0..2 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 0
81, 1944, 81524, 6698520, 1021660750, 279924727600, 147986688652636, 142416219762742160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A238046

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A224312 A224376 A237957 * A236088 A253448 A205978

Adjacent sequences:  A238035 A238036 A238037 * A238039 A238040 A238041

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved

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Last modified July 28 11:14 EDT 2021. Contains 346326 sequences. (Running on oeis4.)