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A304220 Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero. 1

%I

%S 21,103,93,190,509,1628,4263,11307,32315,89108,241808,671482,1860876,

%T 5112838,14112560,39021398,107604674,296850358,819720184,2262238142,

%U 6242240358,17229841514,47554661392,131237610194,362206032762

%N Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A304221.

%H R. H. Hardin, <a href="/A304220/b304220.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) +a(n-2) +10*a(n-3) +5*a(n-4) -2*a(n-5) -13*a(n-6) -16*a(n-7) -8*a(n-8) +10*a(n-9) +22*a(n-10) +9*a(n-11) -20*a(n-12) -22*a(n-13) -4*a(n-14) +14*a(n-15) +12*a(n-16) +6*a(n-17) -6*a(n-18) for n>24

%e Some solutions for n=7

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

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

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

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

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

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

%Y Cf. A304221.

%K nonn

%O 1,1

%A _R. H. Hardin_, May 08 2018

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Last modified July 30 23:12 EDT 2021. Contains 346365 sequences. (Running on oeis4.)