OFFSET
1,2
COMMENTS
Diagonal of A190071
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..21
EXAMPLE
Some solutions for n=4
..4...-1...-2....1...-1...-4....4...-3...-2...-4...-3...-3....4...-1....2...-2
..4...-2...-1....1....2...-4....1...-2...-3....2....1....4....2....1....2...-1
.-2....1...-2....3...-4...-2...-3...-1...-4....2...-4...-2...-2...-1....2...-3
.-1....3....2...-4....4....1....2....3....2...-2...-2...-1....2...-2....4....2
..1....2...-1....4....2...-1...-1...-1....3...-1...-2...-2...-4...-2...-2...-2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin May 04 2011
STATUS
approved