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Number of (n+1) X (4+1) 0..3 arrays with no 2 X 2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.
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%I #6 May 28 2021 13:48:51

%S 647154,442476530,301644677965,205729518595782,140311657486510902,

%T 95695193651485137766,65265944559607354012467,

%U 44512625089074325076093620,30358463245869796237858714204,20705053555910102684134541106487

%N Number of (n+1) X (4+1) 0..3 arrays with no 2 X 2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.

%C Column 4 of A251402.

%H R. H. Hardin, <a href="/A251398/b251398.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

%e ..2..1..3..3..0....0..2..3..1..2....2..3..2..2..3....2..2..0..2..1

%e ..0..1..2..0..1....2..1..1..0..2....2..0..0..2..0....0..0..3..1..3

%Y Cf. A251402.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 02 2014