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A238064 Number of (n+1)X(n+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 0
256, 16116, 2296588, 506608980, 323819924384, 448255641499780, 1736639229342029538, 13883769406039825746192 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A238072

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A269204 A224283 A224206 * A176764 A235964 A206319

Adjacent sequences:  A238061 A238062 A238063 * A238065 A238066 A238067

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved

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Last modified July 28 17:15 EDT 2021. Contains 346335 sequences. (Running on oeis4.)