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A236867 Number of (n+1)X(n+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock equal 0
81, 1503, 61750, 5913287, 1152135751, 522548961680, 503953627472071, 1150154956960934843 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A236875

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A283542 A237771 A110921 * A203650 A284057 A237559

Adjacent sequences:  A236864 A236865 A236866 * A236868 A236869 A236870

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2014

STATUS

approved

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Last modified May 21 06:36 EDT 2022. Contains 353889 sequences. (Running on oeis4.)