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A235764 Number of (n+1)X(7+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 1

%I #4 Jan 15 2014 09:24:44

%S 6109,199720,6840001,210973948,6523068739,190693042666,5613901408380,

%T 163021504427647,4757776001369799,137694335673338797,

%U 3945926499202143307,110957623830297904192,3049712982201331250704,81622728848580076005291

%N Number of (n+1)X(7+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise

%C Column 7 of A235765

%H R. H. Hardin, <a href="/A235764/b235764.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 15 2014

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Last modified April 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)