OFFSET
1,1
COMMENTS
Column 3 of A223255.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +75*a(n-2) -126*a(n-3) -70*a(n-4) +48*a(n-5).
Empirical g.f.: -4*x*(78*x^4 -46*x^3 -175*x^2 +43*x +8) / (48*x^5 -70*x^4 -126*x^3 +75*x^2 +2*x -1). - Colin Barker, May 03 2014
EXAMPLE
Some solutions for n=3:
..3..0..1....4..0..3....3..4..3....1..0..4....4..3..4....1..0..3....1..0..3
..0..2..0....0..2..0....4..3..4....0..1..0....0..4..3....0..1..0....0..2..0
..4..0..2....2..0..3....3..4..0....3..0..2....3..0..4....3..0..1....2..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 18 2013
STATUS
approved