OFFSET
1,1
COMMENTS
Column 2 of A240260
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) -20*a(n-2) +16*a(n-3) +4*a(n-4) -25*a(n-5) +53*a(n-6) -68*a(n-7) +100*a(n-8) -62*a(n-9) -41*a(n-10) +34*a(n-11) -117*a(n-12) +108*a(n-13) -54*a(n-14) +93*a(n-15) +41*a(n-16) +20*a(n-17) +8*a(n-18) -41*a(n-19) -26*a(n-20) -41*a(n-21) +9*a(n-22) +5*a(n-23) +2*a(n-24) +4*a(n-25) -13*a(n-26) +4*a(n-27) -3*a(n-28) -2*a(n-29) +4*a(n-30) +a(n-31)
EXAMPLE
Some solutions for n=5
..0..2....2..2....2..0....3..3....0..2....2..0....2..0....2..0....0..2....0..0
..2..2....0..2....0..2....2..2....2..2....0..2....2..2....0..2....0..0....0..2
..2..0....2..0....0..2....0..0....0..2....2..0....2..0....2..0....0..2....0..2
..0..0....0..0....2..0....0..0....0..2....0..2....0..2....0..0....0..2....2..0
..3..3....0..2....0..2....3..3....2..2....0..0....0..0....3..2....2..0....0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 03 2014
STATUS
approved