OFFSET
1,1
COMMENTS
Column 4 of A317773.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-4) +6*a(n-7) -a(n-8) -a(n-9) -a(n-10) -7*a(n-11) -7*a(n-12) +2*a(n-13) -a(n-14) for n>23
EXAMPLE
Some solutions for n=5
..0..0..0..0. .0..0..0..1. .0..1..1..1. .0..0..0..1. .0..0..0..1
..0..0..0..0. .0..0..0..0. .0..0..1..1. .0..0..0..0. .0..0..0..0
..0..0..0..0. .0..0..0..0. .0..0..0..1. .0..0..0..0. .0..0..0..0
..1..0..0..0. .0..0..0..0. .0..0..0..0. .1..0..0..0. .0..0..0..0
..1..1..0..0. .1..0..0..0. .0..0..0..0. .1..1..0..0. .0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 06 2018
STATUS
approved