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A223676 Number of nX4 0..1 arrays with rows and antidiagonals unimodal 1

%I #4 Mar 25 2013 11:07:40

%S 11,121,1118,9822,85663,744272,6458585,56030742,486038270,4215998078,

%T 36570143008,317213501163,2751542844692,23867162292347,

%U 207026174729348,1795765890711121,15576654086308004,135113465080900087

%N Number of nX4 0..1 arrays with rows and antidiagonals unimodal

%C Column 4 of A223680

%H R. H. Hardin, <a href="/A223676/b223676.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 11*a(n-1) -21*a(n-2) +18*a(n-3) -114*a(n-4) +183*a(n-5) -96*a(n-6) +80*a(n-7) -65*a(n-8) +16*a(n-9)

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 25 2013

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)