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A181223 Number of nX7 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally 1

%I #3 Mar 31 2012 12:35:49

%S 81,6561,179097,7426986,316896477,12297765846,493466099722,

%T 19886730240632,794878208506289,31852650059853831,1277093175893680596,

%U 51166967011661264756,2050407503529684003122,82170493913101130433607

%N Number of nX7 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally

%C Column 7 of A181224

%H R. H. Hardin, <a href="/A181223/b181223.txt">Table of n, a(n) for n=1..175</a>

%e Some avoided solutions for 3X7

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 10 2010

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Last modified July 13 09:52 EDT 2024. Contains 374274 sequences. (Running on oeis4.)