OFFSET
1,1
COMMENTS
Column 1 of A252457
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) +9*a(n-3) -9*a(n-4) +4*a(n-5) -22*a(n-6) -14*a(n-7) -19*a(n-8) -8*a(n-9) +8*a(n-10) +18*a(n-11) +24*a(n-12) +20*a(n-13) +6*a(n-14) -4*a(n-15) -8*a(n-16) -4*a(n-17) for n>20
EXAMPLE
Some solutions for n=4
..2..0..3....1..3..1....3..3..2....2..3..3....3..3..3....3..2..3....2..3..3
..3..3..3....1..1..1....2..3..3....3..3..3....3..3..3....3..3..3....3..3..3
..3..2..3....1..1..1....3..3..3....3..3..3....3..3..3....3..3..3....3..3..3
..3..3..3....3..1..1....3..2..3....3..2..3....3..3..2....3..3..3....3..3..3
..3..3..2....1..1..3....3..3..3....3..3..3....3..3..3....2..3..3....3..3..3
..2..3..3....1..1..1....2..3..3....3..3..2....3..2..3....3..2..3....3..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2014
STATUS
approved