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A320370 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Oct 11 2018 14:12:00

%S 64,8192,569608,37398884,2486026176,165355751224,10993944343316,

%T 731023916987668,48608312646628816,3232138361835207448,

%U 214916439617787409844,14290565387888543489420,950231025365163583436224

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

%C Column 7 of A320371.

%H R. H. Hardin, <a href="/A320370/b320370.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A320371.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 11 2018

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Last modified February 21 18:07 EST 2024. Contains 370237 sequences. (Running on oeis4.)