OFFSET
1,1
COMMENTS
Column 3 of A203728
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) -30*a(n-2) +31*a(n-3) +67*a(n-4) -220*a(n-5) +136*a(n-6) +300*a(n-7) -546*a(n-8) +78*a(n-9) +572*a(n-10) -494*a(n-11) -130*a(n-12) +404*a(n-13) -152*a(n-14) -100*a(n-15) +99*a(n-16) -15*a(n-17) -14*a(n-18) +7*a(n-19) -a(n-20) for n>23
EXAMPLE
Some solutions for n=4
..2..1..1..1....0..2..2..2....2..1..2..2....0..0..0..2....0..1..1..2
..1..2..2..2....2..2..2..2....1..2..2..2....2..2..2..2....2..2..2..2
..1..2..2..2....2..2..2..2....1..2..2..2....2..2..2..2....2..2..2..2
..2..2..2..2....2..2..2..2....1..2..2..2....2..2..2..2....2..2..2..2
..2..2..2..2....2..2..2..2....2..2..2..2....2..2..2..2....2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2012
STATUS
approved