OFFSET
1,1
COMMENTS
Row 1 of A232316
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +a(n-2) -2*a(n-4) for n>5.
Empirical: G.f.: 2*x -x^2*(-5-x+x^2+3*x^3) / ( 1-3*x-x^2+2*x^4 ). - R. J. Mathar, Nov 24 2013
EXAMPLE
Some.solutions.for.n=7
..0..0..1..1..0..0..0..1....0..0..0..1..1..0..0..0....0..0..0..1..1..1..0..0
..1..1..1..1..0..1..1..1....0..0..1..1..1..0..1..1....0..0..0..0..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 22 2013
STATUS
approved