OFFSET
1,1
COMMENTS
Row 2 of A297694.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +4*a(n-2) -6*a(n-3)
EXAMPLE
Some solutions for n=7
..1..0..0..0..0..1..0. .1..0..1..0..0..0..0. .1..0..0..1..0..1..1
..1..0..1..0..0..1..0. .1..0..0..0..1..0..0. .1..0..1..1..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2018
STATUS
approved