OFFSET
1,1
COMMENTS
Column 1 of A252075
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +2*a(n-3) +2*a(n-4) -5*a(n-5) -6*a(n-6) -8*a(n-7) -3*a(n-8) +3*a(n-9) +6*a(n-10) +6*a(n-11) +2*a(n-12) for n>14
EXAMPLE
Some solutions for n=4
..2..2..1....2..2..2....1..2..2....2..2..2....2..2..2....1..2..2....0..1..1
..1..2..2....1..2..2....2..2..2....2..1..2....2..2..2....2..2..2....1..0..0
..2..2..2....2..2..2....2..1..2....2..2..2....2..2..2....2..2..2....0..0..1
..2..2..2....2..1..2....2..2..2....2..2..2....2..2..1....2..2..2....1..1..0
..2..2..2....2..2..2....1..2..2....1..2..2....1..2..2....1..2..2....0..0..1
..2..2..1....2..2..1....2..1..2....2..2..1....2..2..2....2..2..1....1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 13 2014
STATUS
approved