OFFSET
1,1
COMMENTS
Row 2 of A218897.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) + 3*a(n-2) - 2*a(n-5).
Empirical g.f.: 2*x*(2 + x - x^3 - x^4) / (1 - x - 3*x^2 + 2*x^5). - Colin Barker, Jul 24 2018
EXAMPLE
Some solutions for n=3:
..1..0..1....0..0..1....1..1..1....0..0..1....1..0..0....0..0..0....1..0..0
..0..0..0....0..0..0....1..1..1....1..0..1....1..0..0....0..0..0....1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 08 2012
STATUS
approved