OFFSET
1,3
COMMENTS
Column 2 of A281165.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) -24*a(n-2) +15*a(n-3) -18*a(n-4) +75*a(n-5) +55*a(n-6) -54*a(n-7) -102*a(n-8) -184*a(n-9) +36*a(n-10) +168*a(n-11) +136*a(n-12) +48*a(n-13) -96*a(n-14) -64*a(n-15)
EXAMPLE
Some solutions for n=4
..0..0. .0..0. .0..0. .0..0. .0..1. .0..0. .0..1. .0..0. .0..1. .0..1
..1..1. .0..0. .1..1. .0..0. .0..1. .0..0. .1..1. .0..0. .0..0. .0..1
..1..1. .1..0. .1..1. .0..1. .1..1. .1..0. .1..1. .1..0. .0..0. .0..0
..1..1. .0..1. .1..0. .1..1. .1..1. .1..0. .0..0. .1..1. .1..1. .0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 16 2017
STATUS
approved