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A237957 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 0
81, 1944, 81483, 7259122, 1421887147, 486414446352, 304213100538740, 404805739208682952 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A237965

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A225019 A224312 A224376 * A238038 A236088 A253448

Adjacent sequences:  A237954 A237955 A237956 * A237958 A237959 A237960

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 16 2014

STATUS

approved

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Last modified August 3 19:17 EDT 2021. Contains 346441 sequences. (Running on oeis4.)