OFFSET
1,1
COMMENTS
Column 5 of A207453.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 48*n^3 - 32*n^2.
Conjectures from Colin Barker, Jun 23 2018: (Start)
G.f.: 16*x*(1 + 12*x + 5*x^2) / (1 - x)^4.
a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) for n>4.
(End).
EXAMPLE
Some solutions for n=5:
0 1 1 1 0 1 1 0 1 0 0 1 1 0 1 0 1 1 0 0
1 0 1 0 1 0 1 1 0 1 1 1 0 1 1 0 1 0 1 1
1 0 1 0 0 0 1 1 0 0 1 1 0 1 1 0 1 0 1 0
1 0 1 0 0 0 1 1 0 0 1 1 0 1 1 0 1 0 1 0
1 0 1 0 0 0 1 1 0 0 0 1 0 1 1 0 1 0 1 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 17 2012
STATUS
approved