OFFSET
1,1
COMMENTS
Column 4 of A232589
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) +9*a(n-2) +2*a(n-3) +a(n-4) +2*a(n-5).
Empirical: G.f.: -2*x*(13+11*x+x^2+3*x^3+2*x^4) / ( (1+x)*(2*x^4-x^3+3*x^2+6*x-1) ). - R. J. Mathar, Nov 23 2014
EXAMPLE
Some solutions for n=7
..0..1..0..1..0....0..1..0..1..0....0..1..0..1..0....0..1..0..1..0
..2..1..2..1..0....2..1..2..1..0....2..1..2..1..0....2..1..2..1..0
..2..1..0..1..2....0..1..2..1..2....0..1..2..1..0....0..1..2..1..0
..2..1..2..1..0....2..1..0..1..0....0..1..2..1..0....0..1..2..1..2
..0..1..0..1..2....2..1..0..1..2....2..1..0..1..0....0..1..2..1..0
..0..1..2..1..0....0..1..2..1..0....0..1..2..1..0....0..1..2..1..2
..2..1..2..1..2....0..1..2..1..0....0..1..2..1..2....0..1..2..1..0
..0..1..0..1..2....2..1..0..1..2....0..1..2..1..0....0..1..0..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 26 2013
STATUS
approved