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A223946 Number of nX5 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing 1

%I

%S 6,36,157,558,1821,5951,20275,71653,257568,928047,3335267,11962223,

%T 42897410,153982177,553329976,1989825264,7158056447,25752911149,

%U 92656210922,333378246553,1199549630143,4316356194035,15532107553777

%N Number of nX5 0..1 arrays with diagonals and antidiagonals unimodal and rows nondecreasing

%C Column 5 of A223949

%H R. H. Hardin, <a href="/A223946/b223946.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 6*a(n-1) -9*a(n-2) -a(n-3) +11*a(n-4) -7*a(n-5) +12*a(n-6) -51*a(n-7) -91*a(n-8) -171*a(n-9) +353*a(n-10) +89*a(n-11) +73*a(n-12) +177*a(n-13) +22*a(n-14) -64*a(n-15) -24*a(n-16)

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 29 2013

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Last modified May 30 15:21 EDT 2020. Contains 334726 sequences. (Running on oeis4.)