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A302380 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1

%I #4 Apr 06 2018 12:41:42

%S 8,2208,127535,8334338,535192095,34271733937,2195619257236,

%T 140685735128595,9013655138528774,577518643711241385,

%U 37002236612561808562,2370775298902153257752,151898260084738496346512

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

%C Column 7 of A302381.

%H R. H. Hardin, <a href="/A302380/b302380.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A302381.

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 06 2018

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Last modified September 6 11:48 EDT 2024. Contains 375712 sequences. (Running on oeis4.)