OFFSET
1,2
COMMENTS
Row 3 of A221255
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..36
FORMULA
Empirical: a(n) = 21*a(n-1) +21*a(n-2) -1891*a(n-3) +4713*a(n-4) +31527*a(n-5) -98973*a(n-6) -92217*a(n-7) +299577*a(n-8) -27117*a(n-9) +103383*a(n-10) -393*a(n-11) +6211*a(n-12) +69*a(n-13) +69*a(n-14) +a(n-15) for n>18
EXAMPLE
Some solutions for n=3
..0..2..1....0..2..0....1..2..0....0..2..2....1..2..0....1..2..0....0..2..2
..0..2..0....1..2..0....0..2..1....0..2..0....0..2..0....1..2..1....0..2..1
..1..2..1....1..2..1....1..2..0....1..2..0....1..2..1....0..2..0....0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 06 2013
STATUS
approved