1,1

Diagonal of A218897

Table of n, a(n) for n=1..10.

Some solutions for n=3

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

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

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

Sequence in context: A052613 A156493 A339299 * A117515 A265936 A085865

Adjacent sequences: A218888 A218889 A218890 * A218892 A218893 A218894

nonn

R. H. Hardin Nov 08 2012

approved