OFFSET
1,1
COMMENTS
Column 4 of A304472.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) -17*a(n-2) +34*a(n-3) -113*a(n-4) +204*a(n-5) -132*a(n-6) +220*a(n-7) -539*a(n-8) +180*a(n-9) +308*a(n-10) +84*a(n-11) -56*a(n-12) -532*a(n-13) +370*a(n-14) -87*a(n-15) +214*a(n-16) -176*a(n-17) +38*a(n-18) -20*a(n-19) +18*a(n-20) -4*a(n-21) for n>25
EXAMPLE
Some solutions for n=5
..0..0..0..0. .0..0..1..0. .0..0..1..1. .0..1..1..1. .0..0..1..0
..1..1..1..1. .1..0..1..1. .0..0..0..1. .1..0..1..1. .0..0..1..1
..1..1..1..1. .1..1..1..1. .0..1..1..1. .1..0..1..1. .0..0..0..0
..0..1..1..1. .0..0..1..1. .0..0..1..1. .1..0..1..1. .0..0..0..0
..0..0..1..1. .1..0..1..0. .1..1..1..0. .0..1..1..0. .1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 13 2018
STATUS
approved