OFFSET
1,1
COMMENTS
Column 3 of A229012.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -5*a(n-3) +2*a(n-4) +11*a(n-5) -11*a(n-6) -2*a(n-7) +19*a(n-8) -8*a(n-9) -13*a(n-10) +28*a(n-11) -18*a(n-12) +a(n-13) +26*a(n-14) -24*a(n-15) +9*a(n-16) +15*a(n-17) -21*a(n-18) +13*a(n-19) +5*a(n-20) -12*a(n-21) +19*a(n-22) -9*a(n-23) -a(n-24) +4*a(n-25) -4*a(n-26) +2*a(n-27).
EXAMPLE
Some solutions for n=4
..2....2....2....1....3....3....1....2....2....3....2....1....2....2....2....1
..0....2....2....2....1....2....2....3....2....2....3....0....2....2....2....3
..1....1....3....0....2....2....3....2....2....1....1....3....1....1....0....0
..1....3....0....3....1....2....2....2....1....1....2....0....2....1....3....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 10 2013
STATUS
approved