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A236521 Number of (n+1)X(6+1) 0..1 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise 1
4020, 108214, 2728079, 63997604, 1448355717, 31459840764, 668463714817, 13878535769685, 284431385172713, 5756312538787583, 115657256984698963, 2308624191351314296, 45907689651660537908, 909911916639050545637 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A236523

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A282128 A099229 A205889 * A235658 A186530 A124728

Adjacent sequences:  A236518 A236519 A236520 * A236522 A236523 A236524

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 27 2014

STATUS

approved

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Last modified January 27 05:41 EST 2021. Contains 340455 sequences. (Running on oeis4.)