OFFSET
1,1
COMMENTS
Column 6 of A209650.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 22*n^4 + (88/3)*n^3 - 22*n^2 - (22/3)*n.
Conjectures from Colin Barker, Jul 12 2018: (Start)
G.f.: 22*x*(1 + 17*x + 7*x^2 - x^3) / (1 - x)^5.
a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5) for n>5.
(End)
EXAMPLE
Some solutions for n=4:
..0..1..0..1..1..0....0..1..0..1..1..0....1..1..1..0..1..0....1..0..1..1..1..0
..1..0..1..0..1..1....0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..1..1..1
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..1..0..1
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 11 2012
STATUS
approved