OFFSET
1,2
COMMENTS
Diagonal of A220562
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..18
EXAMPLE
Some solutions for n=3 0=self 3=ne 4=w 6=e 7=sw (reciprocal directions total 10)
..0..6..4....0..7..7....0..6..4....6..4..7....6..4..0....0..7..7....0..7..7
..0..6..4....3..3..7....0..7..0....0..3..0....0..7..7....3..3..0....3..3..0
..0..6..4....0..3..0....3..0..0....0..0..0....3..3..0....0..0..0....6..4..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 16 2012
STATUS
approved