OFFSET
1,1
COMMENTS
Column 6 of A203878
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..54
FORMULA
Empirical: a(n) = 679*a(n-1) -678*a(n-2) -22734242*a(n-3) +933140579*a(n-4) +155787014907*a(n-5) -8051016327620*a(n-6) -290807316124696*a(n-7) +19393915590207480*a(n-8) -42256736666853016*a(n-9) -8847432014178030560*a(n-10) +83507954113124940672*a(n-11) +1074868787162173623984*a(n-12) -16105881486499812890064*a(n-13) +14956375338761404032576*a(n-14) +524896293102578305429248*a(n-15) -2119130239859527520231424*a(n-16) +1594233946756949214802176*a(n-17)
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0..1....0..0..0..0..0..1..0....0..0..0..0..0..0..0
..2..1..1..1..3..2..3....1..2..1..3..2..1..3....1..2..3..2..1..1..2
..2..3..0..2..0..0..1....0..3..1..0..2..1..0....1..2..1..0..3..3..3
..0..1..1..3..3..2..1....0..3..1..3..3..1..3....1..2..1..2..1..2..0
..2..2..2..2..1..0..3....0..2..0..2..0..1..0....0..2..0..2..3..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 07 2012
STATUS
approved