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Number of (n+1)X(7+1) 0..3 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction
1

%I #4 Nov 24 2014 20:53:10

%S 2787971,57297797,885728348,11375090117,124278132580,1206582455860,

%T 10608507190002,86519586107488,662520750392365,4828047984947538,

%U 33746485369971392,228069632455771019,1498142997106862975

%N Number of (n+1)X(7+1) 0..3 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction

%C Column 7 of A250536

%H R. H. Hardin, <a href="/A250535/b250535.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 24 2014