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A237159 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock equal 0
81, 997, 25705, 1470317, 162748369, 36060137413, 14858103057089, 12205719127343193, 18568986704493659401, 57651677396633858812053 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A237167

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A236885 A205729 A237226 * A183807 A264203 A236047

Adjacent sequences:  A237156 A237157 A237158 * A237160 A237161 A237162

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2014

STATUS

approved

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Last modified October 25 00:01 EDT 2020. Contains 338010 sequences. (Running on oeis4.)