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A298901 Number of nX7 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. 1

%I #4 Jan 28 2018 09:20:39

%S 0,8,12,56,471,4689,44186,522001,5379458,62969638,689301117,

%T 7995632432,89669878606,1030894396261,11694235466700,133810754113662,

%U 1523947269885410,17410346219635865,198543925466100523

%N Number of nX7 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

%C Column 7 of A298902.

%H R. H. Hardin, <a href="/A298901/b298901.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A298902.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 28 2018

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Last modified July 16 11:57 EDT 2024. Contains 374347 sequences. (Running on oeis4.)