OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 26*a(n-1) - 97*a(n-2) + 89*a(n-3) - 18*a(n-4) + a(n-5).
Empirical g.f.: 3*x*(3 - 25*x + 50*x^2 - 69*x^3 + 9*x^4) / ((1 - x)*(1 - 25*x + 72*x^2 - 17*x^3 + x^4)). - Colin Barker, Sep 21 2018
EXAMPLE
Some solutions for n=3:
..2..0..0..2....2..0..1..1....2..0..2..0....0..2..2..0....2..0..2..0
..2..1..1..1....2..2..0..2....2..1..1..1....0..0..2..0....0..2..1..1
..0..2..2..0....2..0..0..2....1..0..2..0....2..1..1..1....2..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 11 2013
STATUS
approved