OFFSET
1,1
COMMENTS
Column 4 of A252558
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 82*a(n-3) -2429*a(n-6) +33486*a(n-9) -261118*a(n-12) +1295078*a(n-15) -4396152*a(n-18) +10604184*a(n-21) -18276440*a(n-24) +22254797*a(n-27) -19021565*a(n-30) +11461650*a(n-33) -4926134*a(n-36) +1526628*a(n-39) -338818*a(n-42) +51264*a(n-45) -4731*a(n-48) +223*a(n-51) -4*a(n-54) for n>60
EXAMPLE
Some solutions for n=4
..0..2..2..0..2..2....3..2..2..3..2..2....3..1..3..3..1..3....0..1..0..3..1..3
..2..3..2..2..0..0....3..1..3..3..1..3....2..2..0..2..2..3....2..2..3..2..2..0
..3..3..1..3..3..1....2..2..3..2..2..0....3..2..2..3..2..2....3..2..2..0..2..2
..3..2..2..0..2..2....3..2..2..0..2..2....3..1..3..3..1..3....3..1..3..3..1..3
..2..3..2..2..0..2....0..1..3..3..1..3....2..2..0..2..2..0....2..2..3..2..2..3
..0..3..1..3..3..1....2..2..0..2..2..3....3..2..2..0..2..2....0..2..2..0..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2014
STATUS
approved