1,2

Diagonal of A202047

Table of n, a(n) for n=1..6.

Some solutions for n=4

.-1.-1..0.-1...-1..1..1.-1....0..0..0..1...-1..0..0..1...-1.-1..0.-1

..1..0..0..0...-1.-1.-1.-1....1..0..0..1....0..0..0.-1....1..1..0..0

..1..0..0..0....1..1..1..1....1.-1.-1..1....1..1..0.-1....1..1..1..1

..0..1..1.-1....1..0..0.-1....0.-1.-1.-1....0..1..0.-1...-1.-1.-1..0

Sequence in context: A252927 A172740 A172816 * A244765 A069612 A077716

Adjacent sequences: A202037 A202038 A202039 * A202041 A202042 A202043

nonn

R. H. Hardin Dec 10 2011

approved