OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 111*a(n-1) - 2128*a(n-2) + 10532*a(n-3) - 17559*a(n-4) + 9045*a(n-5).
Empirical g.f.: x*(6 - 353*x + 2937*x^2 - 8295*x^3 + 7230*x^4) / ((1 - x)*(1 - 18*x + 27*x^2)*(1 - 92*x + 335*x^2)). - Colin Barker, Oct 07 2018
EXAMPLE
Some solutions for n=3:
..0..1..0....0..1..1....0..0..1....0..1..5....0..1..5....0..1..0....0..1..1
..2..1..0....2..1..2....2..0..2....2..2..4....1..2..1....0..2..1....2..0..0
..0..1..0....1..0..0....4..0..2....0..1..0....0..0..0....2..1..3....5..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 04 2013
STATUS
approved