OFFSET
1,1
COMMENTS
Column 5 of A252243.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 1804*a(n-3) -939040*a(n-6) +145285120*a(n-9) -1639972864*a(n-12) +4294967296*a(n-15) for n>16.
EXAMPLE
Some solutions for n=1
..0..1..1..3..1..1..3....2..3..0..2..3..3..2....0..2..3..3..2..0..0
..2..0..3..2..0..0..2....1..2..2..1..2..2..1....1..3..1..1..0..1..1
..3..1..1..0..1..1..0....2..3..3..2..0..3..2....1..0..1..1..3..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 15 2014
STATUS
approved