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A235831 Number of (n+1)X(4+1) 0..2 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise 1
20537, 1403872, 87473420, 4948377018, 264596677243, 13346776888685, 644799592944959, 29960807090645254, 1349539165629052781, 59215045232911300005, 2544072449211208400584, 107453219274532827649732 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A235833

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..85

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A178585 A187282 A235836 * A235587 A082254 A059050

Adjacent sequences:  A235828 A235829 A235830 * A235832 A235833 A235834

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2014

STATUS

approved

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Last modified November 29 14:52 EST 2020. Contains 338769 sequences. (Running on oeis4.)