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A234047 Number of (n+2)X(1+2) 0..2 arrays with no increasing sequence of length 3 horizontally, diagonally downwards or antidiagonally downwards 1

%I #5 Dec 19 2013 05:47:13

%S 16488,402000,9780884,237966121,5789254059,140841087777,3426377423999,

%T 83356792653385,2027901056098050,49334703868796952,

%U 1200212896541783312,29198736059766709177,710345797718783050638,17281266945996322962456

%N Number of (n+2)X(1+2) 0..2 arrays with no increasing sequence of length 3 horizontally, diagonally downwards or antidiagonally downwards

%C Column 1 of A234054

%H R. H. Hardin, <a href="/A234047/b234047.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 25*a(n-1) -14*a(n-2) -53*a(n-3) +257*a(n-4) -8907*a(n-5) +3783*a(n-6) +24912*a(n-7) -11484*a(n-8) +1593*a(n-9) -5184*a(n-10) -3888*a(n-11)

%e Some solutions for n=1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 19 2013

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)