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Number of nX7 0..1 arrays with every element equal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.
1

%I #4 Jan 11 2018 08:23:10

%S 0,54,953,13350,302143,7794251,180902016,4321153141,102552409457,

%T 2453761654793,58598441957270,1398559408845196,33406481023496985,

%U 797830290769560556,19053436159307289623,455043131244674608337

%N Number of nX7 0..1 arrays with every element equal to 2, 3, 4 or 6 king-move adjacent elements, with upper left element zero.

%C Column 7 of A298070.

%H R. H. Hardin, <a href="/A298069/b298069.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A298070.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 11 2018