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 A235961 Number of (n+1)X(7+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise 1

%I

%S 7560,176420,3311312,59037352,997114552,16500794898,267591383236,

%T 4292672074802,68206975579218,1077169051968340,16927257076479028,

%U 265101072902208072,4140802701438271022,64556448436549241648

%N Number of (n+1)X(7+1) 0..1 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

%C Column 7 of A235962

%H R. H. Hardin, <a href="/A235961/b235961.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for n=2

%e ..0..0..1..0..1..0..0..1....0..0..1..1..0..0..0..1....0..0..0..0..0..0..0..0

%e ..0..0..0..0..0..0..1..1....0..1..0..0..1..1..1..0....0..1..0..0..0..1..0..1

%e ..0..1..0..0..0..1..1..1....0..0..0..0..0..1..0..0....0..0..0..0..1..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 17 2014

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Last modified September 25 11:39 EDT 2021. Contains 347654 sequences. (Running on oeis4.)