OFFSET
1,1
COMMENTS
Column 2 of A237241
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 27*a(n-1) -91*a(n-2) -3569*a(n-3) +35156*a(n-4) +49666*a(n-5) -1874168*a(n-6) +4352300*a(n-7) +38774384*a(n-8) -177907576*a(n-9) -291750128*a(n-10) +2804232800*a(n-11) -1221147328*a(n-12) -21414085888*a(n-13) +34643343872*a(n-14) +71205959680*a(n-15) -216011419648*a(n-16) -11342790656*a(n-17) +524108857344*a(n-18) -420200841216*a(n-19) -327413137408*a(n-20) +579833167872*a(n-21) -214563815424*a(n-22)
EXAMPLE
Some solutions for n=3
..0..3..2....2..3..0....1..1..3....2..3..2....2..1..1....0..1..2....3..3..0
..2..1..0....3..3..1....2..0..2....1..1..1....0..2..3....2..3..0....0..1..3
..3..2..3....2..3..0....3..3..1....2..3..2....2..1..3....0..1..0....1..1..2
..0..3..0....3..3..1....0..2..2....2..2..2....2..2..3....0..3..0....2..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 05 2014
STATUS
approved