OFFSET
1,2
COMMENTS
Column 2 of A263373.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +101*a(n-6) -404*a(n-7) -2159*a(n-12) +8636*a(n-13) +2059*a(n-18) -8236*a(n-19)
EXAMPLE
Some solutions for n=4
..0..2..1....0..0..0....0..2..1....0..0..0....1..1..2....0..2..1....0..2..1
..0..2..1....2..1..0....2..1..0....0..0..0....2..1..0....0..0..0....1..1..2
..0..0..0....1..1..2....0..0..0....2..1..0....0..0..0....0..0..0....0..0..0
..0..2..1....0..2..1....0..2..1....1..1..2....1..1..2....0..2..1....0..2..1
..0..2..1....0..0..0....2..1..0....0..2..1....2..1..0....0..0..0....1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 16 2015
STATUS
approved