OFFSET
1,1
COMMENTS
Column 6 of A252640
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 856*a(n-3) -242572*a(n-6) +29720906*a(n-9) -1602181457*a(n-12) +35744049414*a(n-15) -617580504991*a(n-18) +7887897442346*a(n-21) -72158427903830*a(n-24) +523158699334442*a(n-27) -2591085325582721*a(n-30) +5595058223175892*a(n-33) +3578963449703396*a(n-36) -28530932892775056*a(n-39) +20891722678397296*a(n-42) +24765258880649920*a(n-45) -28231745865638400*a(n-48) +3200764170240000*a(n-51) for n>63
EXAMPLE
Some solutions for n=2
..1..0..3..1..3..3..1..3....3..2..2..3..2..2..0..2....2..3..2..2..3..2..2..0
..2..0..2..2..0..2..2..3....2..3..2..2..3..2..2..0....2..2..3..2..2..3..2..2
..2..2..3..2..2..3..2..2....0..3..1..0..3..1..3..3....1..0..3..1..3..3..1..0
..1..0..3..1..3..3..1..3....0..2..2..3..2..2..3..2....2..3..2..2..3..2..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2014
STATUS
approved