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A237937 Number of (n+1)X(n+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal 0
81, 5519, 2020033, 4202495253, 43830625875881, 2286487486628925039, 588945572180874908222729, 750899466581610572275099099051, 4734118942676314823884430739438571861 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A237945

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A238172 A260858 A237300 * A060349 A212706 A036354

Adjacent sequences:  A237934 A237935 A237936 * A237938 A237939 A237940

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 16 2014

STATUS

approved

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Last modified January 19 22:12 EST 2022. Contains 350466 sequences. (Running on oeis4.)