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A183693 Number of (n+1)X5 0..2 arrays with every 2X2 subblock nonsingular 1

%I #5 Mar 31 2012 12:35:53

%S 12362,969978,75166498,5848268518,454422625582,35325040673626,

%T 2745624826054514,213413389362873662,16588019956268604926,

%U 1289347795300644331026,100217757971785737168402

%N Number of (n+1)X5 0..2 arrays with every 2X2 subblock nonsingular

%C Column 4 of A183698

%H R. H. Hardin, <a href="/A183693/b183693.txt">Table of n, a(n) for n = 1..157</a>

%F Empirical: a(n)=40*a(n-1)+3314*a(n-2)-10714*a(n-3)-1591695*a(n-4)+5974533*a(n-5)+283908660*a(n-6)-1911994230*a(n-7)-15930513416*a(n-8)+178719705971*a(n-9)-192907598766*a(n-10)-2682038440672*a(n-11)+6467234810528*a(n-12)+14403476148048*a(n-13)-42735625715392*a(n-14)-34526954247616*a(n-15)+97954297842688*a(n-16)+34981712707072*a(n-17)-68662768934912*a(n-18)-15576419467264*a(n-19)

%e Some solutions for 3X5

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 06 2011

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Last modified March 28 16:12 EDT 2024. Contains 371254 sequences. (Running on oeis4.)