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A250796 Number of (n+1)X(7+1) 0..1 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction 1

%I #4 Nov 27 2014 16:10:38

%S 1102,3868,13598,48600,177142,653880,2437366,9144752,34478398,

%T 130446176,494830430,1880740552,7158985446,27281746344,104059447110,

%U 397187462784,1516879760334,5795614884304,22151486206382,84689884626136

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

%C Column 7 of A250797

%H R. H. Hardin, <a href="/A250796/b250796.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 14*a(n-1) -68*a(n-2) +88*a(n-3) +312*a(n-4) -1008*a(n-5) +62*a(n-6) +2576*a(n-7) -1535*a(n-8) -2790*a(n-9) +1886*a(n-10) +1456*a(n-11) -656*a(n-12) -336*a(n-13)

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 27 2014

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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)