OFFSET
1,1
COMMENTS
Column 3 of A251428
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..109
FORMULA
Empirical: a(n) = 11*a(n-1) -40*a(n-2) +28*a(n-3) +156*a(n-4) -332*a(n-5) +89*a(n-6) -263*a(n-7) +2117*a(n-8) -2247*a(n-9) -4433*a(n-10) +9779*a(n-11) -1921*a(n-12) +1315*a(n-13) -27632*a(n-14) +27440*a(n-15) +35510*a(n-16) -66532*a(n-17) +23084*a(n-18) -38208*a(n-19) +116256*a(n-20) -72640*a(n-21) -64384*a(n-22) +115840*a(n-23) -109312*a(n-24) +125184*a(n-25) -120064*a(n-26) +72704*a(n-27) -25600*a(n-28) +4096*a(n-29)
EXAMPLE
Some solutions for n=7
..2....0....2....2....2....1....0....3....1....1....2....1....0....0....1....0
..2....3....3....0....3....2....2....1....0....1....2....1....0....0....0....0
..2....0....3....2....1....0....2....1....1....3....3....3....0....1....2....0
..1....3....3....3....1....1....0....3....1....0....2....0....1....3....2....1
..0....2....2....3....0....2....3....2....1....2....3....3....3....2....1....3
..2....2....3....0....2....0....0....2....3....1....1....0....1....1....1....3
..1....2....2....1....1....1....2....2....0....0....0....3....2....1....1....2
..0....2....2....2....0....0....2....1....2....3....3....0....2....0....1....2
..1....2....3....0....3....1....3....0....1....2....3....2....1....2....1....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2014
STATUS
approved