1,1
Diagonal of A187729
Table of n, a(n) for n=1..10.
Some solutions for 3X3
..0..0..1....1..0..1....1..0..1....0..1..1....1..1..1....1..0..0....1..1..1
..1..1..1....1..1..0....1..1..0....0..1..0....0..0..1....1..0..1....0..1..0
..0..1..0....1..1..0....1..1..1....1..1..1....1..0..1....1..1..0....1..0..0
Sequence in context: A021374 A253343 A215687 * A017931 A021129 A268869
Adjacent sequences: A187717 A187718 A187719 * A187721 A187722 A187723
nonn
R. H. Hardin Mar 13 2011
approved