OFFSET
1,2
COMMENTS
Row 2 of A220993
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +3*a(n-2) -16*a(n-3) +3*a(n-4) +25*a(n-5) -12*a(n-6) -16*a(n-7) +4*a(n-9) +40*a(n-10) -16*a(n-11) -16*a(n-12)
EXAMPLE
Some solutions for n=3
..1..1..0....1..1..0....1..1..1....0..0..1....1..1..1....1..0..0....0..0..1
..1..0..0....0..1..1....0..0..1....0..1..1....1..0..0....1..1..1....1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 28 2012
STATUS
approved