OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 10*a(n-1) + 8704*a(n-4) - 87040*a(n-5).
Empirical g.f.: 64*x*(25 - 7*x - 92*x^2 + 272*x^3 - 220320*x^4) / ((1 - 10*x)*(1 - 8704*x^4)). - Colin Barker, Oct 21 2018
EXAMPLE
Some solutions for n=3:
..1..0..2..2....0..1..1..0....0..1..0..2....0..0..0..0....1..0..0..2
..1..1..1..0....1..2..1..2....0..1..1..1....1..2..2..1....0..1..0..0
..0..0..1..2....1..1..2..2....2..2..2..1....2..1..0..1....2..0..1..0
..2..1..0..2....0..0..2..2....0..2..1..2....1..1..2..0....1..1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 02 2014
STATUS
approved