OFFSET
1,1
COMMENTS
Column 7 of A207453.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 168*n^4 - 84*n^3 - 84*n^2 + 42*n.
Conjectures from Colin Barker, Jun 23 2018: (Start)
G.f.: 42*x*(1 + 37*x + 55*x^2 + 3*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=5:
0 1 1 0 1 1 1 0 1 1 1 1 1 1 0 1 0 1 0 1 1
1 1 0 1 1 1 1 1 1 0 1 0 1 0 0 1 0 1 1 1 1
0 1 0 1 0 1 1 1 1 0 1 0 1 0 0 1 0 1 0 1 1
0 1 0 1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 1 0
0 1 0 1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 1 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 17 2012
STATUS
approved