OFFSET
1,1
COMMENTS
Column 1 of A252558
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 26*a(n-3) -280*a(n-6) +1644*a(n-9) -5901*a(n-12) +13891*a(n-15) +9*a(n-16) -22285*a(n-18) -87*a(n-19) +24609*a(n-21) +235*a(n-22) -18285*a(n-24) -174*a(n-25) +8465*a(n-27) -229*a(n-28) -2074*a(n-30) +496*a(n-31) +616*a(n-33) -313*a(n-34) -1069*a(n-36) +38*a(n-37) +983*a(n-39) +40*a(n-40) -355*a(n-42) -17*a(n-43) -37*a(n-45) +2*a(n-46) +72*a(n-48) -21*a(n-51) +2*a(n-54) for n>60
EXAMPLE
Some solutions for n=4
..2..3..2....3..2..2....0..1..3....1..3..3....0..1..0....2..2..0....1..2..1
..1..1..0....3..1..0....2..2..3....2..0..2....2..2..3....1..3..3....0..0..1
..0..1..3....2..2..3....3..2..2....2..2..3....3..2..2....2..3..2....2..1..1
..2..3..2....3..2..2....0..1..3....1..3..3....0..1..3....2..2..0....1..2..1
..3..1..3....3..1..3....0..2..0....2..0..2....0..2..0....1..3..3....2..2..3
..0..1..3....2..2..0....0..0..2....0..2..0....3..2..2....0..0..2....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2014
STATUS
approved