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A236885 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock equal 0
81, 975, 22393, 1107653, 95406881, 18882502861, 5930319470993, 4826668916366649, 5602584763152248073, 19536887913580369729045 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A236893

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A205047 A086580 A206269 * A205729 A237226 A237159

Adjacent sequences:  A236882 A236883 A236884 * A236886 A236887 A236888

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2014

STATUS

approved

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Last modified March 29 15:03 EDT 2020. Contains 333107 sequences. (Running on oeis4.)