OFFSET
1,4
COMMENTS
Row 10 of A187857
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..50
FORMULA
Empirical: a(n) = 86897560*n^2 - 1108193530*n + 3420011978 for n>17
EXAMPLE
Some solutions for 4X4
..0..9..0..0....9..8..3..2....0..9..8..5....0..0..6..0....0..1.10..2
..7..3..8..0....0..7..0..1....0..4..1..7....4..1..5..8....9..4..0..0
..0..6..2.10...10..4..6..5...10..3..0..6....3..7..0.10....0..8..3..0
..1..0..5..4....0..0..0..0....0..0..2..0....0..2..0..9....5..7..6..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2011
STATUS
approved