OFFSET
1,1
COMMENTS
Table starts
.........256............3891.............60074.............927477
........3891..........227890..........13360840..........783375343
.......60074........13360840........2976803436.......663296784123
......927477.......783375343......663296784123....561714653720250
....14319230.....45931015744...147795682647630.475681559860717916
...221073168...2693039069563.32931888185295104
..3413126694.157898954845170
.52694924343
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..40
EXAMPLE
Some solutions for 4X3
..0..0..0....3..0..0....2..0..0....0..0..0....0..0..0....1..0..0....1..0..0
..3..1..0....3..2..0....1..1..0....1..1..0....3..2..0....0..3..0....1..2..0
..3..0..3....1..3..3....3..2..3....3..1..0....0..2..0....2..1..2....0..0..0
..2..1..3....0..1..2....0..0..0....1..3..0....0..3..1....2..3..2....3..1..2
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Feb 23 2011
STATUS
approved