OFFSET
1,1
COMMENTS
Column 2 of A266067.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +20*a(n-3) +30*a(n-4) -50*a(n-5) -160*a(n-6) -512*a(n-7) -404*a(n-8) +948*a(n-9) +1880*a(n-10) +4248*a(n-11) +1088*a(n-12) -3776*a(n-13) -7488*a(n-14) -5376*a(n-15) +4352*a(n-16) +4608*a(n-17) +8192*a(n-18)
EXAMPLE
Some solutions for n=4
..0..1....0..1....0..0....2..2....1..0....0..0....1..0....1..0....1..2....0..1
..2..1....2..2....0..0....1..1....1..1....2..2....2..2....1..1....1..0....2..1
..2..2....1..0....0..2....1..0....1..1....1..1....1..0....1..1....2..2....2..2
..1..0....1..2....1..1....1..2....1..0....1..0....1..1....0..1....1..0....0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2015
STATUS
approved