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A235656 Number of (n+1)X(4+1) 0..1 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order rowwise and columnwise 1
476, 6378, 85700, 1088450, 13349432, 156257766, 1760232169, 19098030172, 200821523820, 2053582822620, 20519104530695, 201006081584245, 1937283413026295, 18420260232233213, 173231193676166625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A235660

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

..0..0..0..0..1....0..0..0..1..0....1..1..1..1..1....1..0..0..0..1

..0..0..0..1..1....0..1..1..1..0....1..1..0..0..0....0..0..0..0..0

..1..0..0..1..0....0..1..1..1..1....0..0..0..0..0....0..1..0..0..0

..1..1..1..1..1....0..1..0..1..0....1..1..1..1..1....0..0..0..1..1

CROSSREFS

Sequence in context: A205287 A236519 A205895 * A264290 A181228 A278286

Adjacent sequences:  A235653 A235654 A235655 * A235657 A235658 A235659

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 13 2014

STATUS

approved

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Last modified January 27 01:03 EST 2021. Contains 340443 sequences. (Running on oeis4.)