OFFSET
1,1
COMMENTS
Column 2 of A296335.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) + 2*a(n-2) + 3*a(n-3) + 2*a(n-4) + a(n-5).
Empirical g.f.: x*(3 + 5*x + 5*x^2 + 3*x^3 + x^4) / (1 - x - 2*x^2 - 3*x^3 - 2*x^4 - x^5). - Colin Barker, Mar 22 2018
EXAMPLE
Some solutions for n=5:
..1..0. .0..0. .1..0. .0..0. .1..0. .0..0. .1..0. .1..0. .0..0. .1..0
..0..0. .1..0. .0..0. .0..0. .0..1. .0..0. .0..0. .0..1. .0..1. .0..1
..0..0. .0..0. .0..0. .0..1. .0..0. .1..1. .1..0. .0..0. .0..0. .0..0
..0..1. .0..0. .0..0. .0..0. .0..1. .1..0. .0..0. .0..0. .0..0. .0..1
..1..1. .1..0. .0..1. .0..1. .0..0. .0..1. .0..0. .1..0. .1..0. .1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2017
STATUS
approved