OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) - 14*a(n-2) + 16*a(n-3) - 9*a(n-4) + 2*a(n-5).
Conjectures from Colin Barker, Nov 27 2018: (Start)
G.f.: x*(35 - 96*x + 119*x^2 - 70*x^3 + 16*x^4) / ((1 - x)^4*(1 - 2*x)).
a(n) = 8*(9*2^n-8) - (109*n)/3 - 8*n^2 - (2*n^3)/3.
(End)
EXAMPLE
Some solutions for n=4:
..1..0..0..0..1....0..0..0..1..1....0..1..1..1..1....1..1..1..1..1
..0..1..1..1..0....0..0..0..0..1....0..0..0..1..1....0..0..0..0..1
..1..0..0..0..1....0..0..1..1..1....0..0..0..0..0....0..0..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 01 2014
STATUS
approved