1,3

Table of n, a(n) for n=1..11.

Some solutions for n=4 with a(1,1)=0

..0..0..0..0....0..1..0..0....0..1..0..0....0..0..1..0....0..1..0..1

..0..1..1..1....1..1..0..1....1..1..1..1....0..1..1..0....1..1..0..1

..0..1..1..0....0..0..1..0....0..1..0..0....1..1..1..0....0..0..0..0

..0..1..0..0....0..1..0..1....0..1..0..1....0..0..0..0....1..1..0..1

Sequence in context: A020054 A206240 A289720 * A326560 A199475 A241599

Adjacent sequences: A190628 A190629 A190630 * A190632 A190633 A190634

nonn

R. H. Hardin May 14 2011

approved