OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 50*a(n-1) - 805*a(n-2) + 4662*a(n-3) - 12150*a(n-4) + 14580*a(n- 5) -6561*a(n-6).
Empirical g.f.: 24*x*(14 - 214*x + 1115*x^2 - 2391*x^3 + 1674*x^4 + 243*x^5) / (1 - 25*x + 90*x^2 - 81*x^3)^2. - Colin Barker, Jan 17 2019
EXAMPLE
Some solutions for n=2:
..1..0..0..0..1..2. .1..2..2..0..1..2. .0..0..1..2..2..2. .1..0..1..0..0..0
..0..1..0..0..1..1. .1..2..1..2..2..2. .0..1..2..2..2..2. .1..0..0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 16 2016
STATUS
approved