OFFSET
1,1
COMMENTS
Column 2 of A200668
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -3*a(n-2) +4*a(n-3) -6*a(n-4) +7*a(n-5) -9*a(n-6) +8*a(n-7) -6*a(n-8) +5*a(n-9) -4*a(n-10) +5*a(n-11) -5*a(n-12) +2*a(n-14) -3*a(n-15) +2*a(n-16) +a(n-17) -2*a(n-18) +5*a(n-19) -3*a(n-20) +a(n-21) -a(n-22) -a(n-24) +a(n-25) -a(n-26) +a(n-27)
EXAMPLE
Some solutions for n=6
..0....2....0....0....1....0....0....2....0....1....1....0....1....1....1....1
..1....2....0....0....1....0....1....2....1....2....1....0....2....1....2....2
..2....2....2....1....2....0....2....2....1....1....2....2....0....2....0....0
..0....2....2....2....1....2....0....0....2....1....2....2....2....1....1....2
..1....2....2....0....1....2....1....1....2....2....2....1....1....1....0....1
..2....0....1....2....2....2....1....0....2....2....0....2....0....1....2....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 20 2011
STATUS
approved