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Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
1

%I #4 Jan 08 2018 08:12:21

%S 8,2907,103558,3211086,109611795,3751364813,127727388127,

%T 4359449485941,148831641978201,5080192954401926,173423354418027819,

%U 5920411674618383958,202112732485637675954,6899798870394720781555,235548707335372098280494

%N Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

%C Column 7 of A297923.

%H R. H. Hardin, <a href="/A297922/b297922.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%Y Cf. A297923.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 08 2018