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A237455 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 0
81, 1376, 27915, 594190, 14411725, 459648432, 15211412806, 474413628922, 17502385423626 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A237463

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A059977 A231912 A116205 * A253488 A236738 A236801

Adjacent sequences:  A237452 A237453 A237454 * A237456 A237457 A237458

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 08 2014

STATUS

approved

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Last modified October 16 13:32 EDT 2019. Contains 328093 sequences. (Running on oeis4.)