OFFSET
1,1
COMMENTS
Column 2 of A266025.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +6*a(n-3) -a(n-4) +20*a(n-5) -25*a(n-6) -37*a(n-7) -53*a(n-8) -52*a(n-9) +47*a(n-10) +74*a(n-11) +77*a(n-12) +30*a(n-13) -29*a(n-14) -34*a(n-15) -34*a(n-16) -a(n-17) -6*a(n-18) +11*a(n-19) +a(n-20) +a(n-21)
EXAMPLE
Some solutions for n=4
..1..1....0..1....1..0....0..1....1..0....1..0....0..1....1..0....1..0....1..0
..0..1....1..2....1..1....2..1....1..2....1..1....2..1....1..2....1..2....2..1
..1..1....2..0....1..2....0..2....2..1....2..2....2..0....1..0....1..2....2..1
..2..0....1..1....0..0....0..1....0..1....0..1....1..1....1..1....0..1....0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2015
STATUS
approved