OFFSET
1,1
COMMENTS
Diagonal of A205193.
FORMULA
Conjectures from Colin Barker, Jan 17 2018: (Start)
G.f.: 4*x*(4 + 10*x - x^2 - 16*x^3) / ((1 - 2*x)^2*(1 + 2*x)^2).
a(n) = 8*a(n-2) - 16*a(n-4) for n>3.
(End)
EXAMPLE
Some solutions for n=4:
0 0 1 0 1 0 0 1 1 0 0 1 0 0 0 1 0 1 0 0
0 0 0 1 1 0 0 1 1 0 1 0 0 0 1 1 1 0 0 0
1 0 0 1 1 1 1 0 0 1 0 0 0 1 0 1 1 0 0 1
0 1 1 0 0 1 1 0 0 0 0 0 1 0 0 1 0 1 1 0
0 1 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 1 1 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 23 2012
STATUS
approved