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A181020 Maximum number of 1s in an nX(n+1) binary matrix with no three 1s adjacent in a line along a row, column or diagonally. 0

%I #7 Dec 11 2020 09:57:47

%S 2,4,7,12,17,23,30,38,47,58

%N Maximum number of 1s in an nX(n+1) binary matrix with no three 1s adjacent in a line along a row, column or diagonally.

%e Some solutions for 6X7

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

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

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

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

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

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

%Y Superdiagonal 1 of A181019.

%K nonn,more

%O 1,1

%A _R. H. Hardin_, Sep 30 2010

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)