OFFSET
1,4
COMMENTS
Row 10 of A187586
FORMULA
Empirical: a(n) = 108852*n^2 - 978404*n + 2100276 for n>8
EXAMPLE
Some solutions for 4X4
..0..8..9.10....0..7..8..9....0..0..0..2....0..8..9.10....0..0..0..0
..1..0..7..0....0..0..6.10....0..7..1..3....0..2..7..0....1..0..7..8
..2..0..5..6....2..3..4..5....0..8..6..4....0..3..1..6....2..6..0..9
..3..4..0..0....0..1..0..0....0..9.10..5....0..4..5..0....3..4..5.10
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 11 2011
STATUS
approved