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A235587 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 rowwise and columnwise 1
20537, 1660676, 140378037, 11284713813, 864122401640, 61249068090242, 4044723177106236, 249130316102719498, 14439907606618894372, 792686015022473183671, 41515305615658138540805, 2086726767803908921050863 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A235588

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..67

EXAMPLE

Some solutions for n=1

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

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

CROSSREFS

Sequence in context: A187282 A235836 A235831 * A082254 A059050 A056073

Adjacent sequences:  A235584 A235585 A235586 * A235588 A235589 A235590

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 12 2014

STATUS

approved

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Last modified October 20 16:05 EDT 2019. Contains 328267 sequences. (Running on oeis4.)