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A181022
Maximum number of 1s in an nX(n+3) binary matrix with no three 1s adjacent in a line along a row, column or diagonally.
0
3, 8, 10, 16, 24, 29, 37, 48, 56
OFFSET
1,1
EXAMPLE
Some solutions for 6X9
..0..1..1..0..1..0..1..0..1....0..1..1..0..1..0..1..1..0
..1..1..0..0..1..1..0..1..1....1..0..1..1..0..1..1..0..1
..0..0..1..1..0..1..0..1..0....1..1..0..0..0..0..0..1..1
..1..0..0..0..1..0..0..0..1....0..0..0..0..1..1..0..0..0
..0..1..1..0..1..0..1..1..0....1..0..1..1..0..1..0..1..1
..1..1..0..1..0..1..0..1..1....1..1..0..1..1..0..0..1..1
CROSSREFS
Superdiagonal 3 of A181019.
Sequence in context: A022801 A128699 A104816 * A185870 A341938 A341939
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Sep 30 2010
STATUS
approved