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A303715 Number of nX4 0..1 arrays with every element unequal to 0, 1 or 5 king-move adjacent elements, with upper left element zero. 1

%I

%S 5,5,8,17,36,76,161,349,749,1604,3449,7412,15912,34177,73421,157693,

%T 338696,727505,1562612,3356300,7209009,15484261,33258581,71436052,

%U 153437513,329568260,707879240,1520453249,3265780149,7014565813

%N Number of nX4 0..1 arrays with every element unequal to 0, 1 or 5 king-move adjacent elements, with upper left element zero.

%C Column 4 of A303719.

%H R. H. Hardin, <a href="/A303715/b303715.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) +a(n-2) +3*a(n-3) +a(n-4) -a(n-5) -a(n-6)

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303719.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 29 2018

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Last modified November 18 17:21 EST 2019. Contains 329287 sequences. (Running on oeis4.)