1,1

Diagonal of A219173

Table of n, a(n) for n=1..7.

Some solutions for n=3

..0..0..0....1..1..1....0..0..0....0..0..0....0..0..1....0..0..1....1..1..2

..0..0..0....1..0..2....0..0..2....0..0..0....0..1..1....0..0..0....1..0..1

..1..2..0....0..0..0....0..1..2....1..0..0....2..1..1....0..0..0....0..0..0

Sequence in context: A156521 A012636 A006031 * A119958 A275195 A031881

Adjacent sequences: A219163 A219164 A219165 * A219167 A219168 A219169

nonn

R. H. Hardin Nov 13 2012

approved