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A303892 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero. 1

%I

%S 2,86,271,1659,7421,39711,195279,1003855,5056641,25707978,130248011,

%T 660626529,3350327180,16988500456,86159495911,436909370593,

%U 2215734673824,11236289992560,56982164600014,288968180495974,1465423301405206

%N Number of nX4 0..1 arrays with every element unequal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

%C Column 4 of A303896.

%H R. H. Hardin, <a href="/A303892/b303892.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +22*a(n-2) -8*a(n-3) -131*a(n-4) +a(n-5) +153*a(n-6) -84*a(n-7) +542*a(n-8) +278*a(n-9) -1349*a(n-10) +447*a(n-11) +711*a(n-12) -308*a(n-13) +422*a(n-14) -2403*a(n-15) +1609*a(n-16) -250*a(n-17) -407*a(n-18) +3132*a(n-19) -3586*a(n-20) +3814*a(n-21) -3697*a(n-22) +375*a(n-23) +1563*a(n-24) -1317*a(n-25) +1526*a(n-26) -1386*a(n-27) +563*a(n-28) -422*a(n-29) +246*a(n-30) -59*a(n-31) +112*a(n-32) -21*a(n-33) -2*a(n-34) -7*a(n-35) for n>40

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303896.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 02 2018

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Last modified October 7 14:13 EDT 2022. Contains 357271 sequences. (Running on oeis4.)