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Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1

%I #4 Mar 13 2018 07:45:02

%S 64,8192,654628,60123512,5431609016,492720806016,44678859224720,

%T 4051836004410912,367449310053104876,33323013503721659420,

%U 3021976074733064177028,274055043912124036181788

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

%C Column 7 of A300804.

%H R. H. Hardin, <a href="/A300803/b300803.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300804.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 13 2018