OFFSET
1,2
COMMENTS
Column 3 of A304894.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +3*a(n-2) -7*a(n-3) -8*a(n-4) -8*a(n-5) +26*a(n-6) -13*a(n-7) -16*a(n-8) +76*a(n-9) -33*a(n-10) -22*a(n-11) +27*a(n-12) -23*a(n-13) +11*a(n-14) +7*a(n-15) -5*a(n-16) +5*a(n-17) -2*a(n-18) -2*a(n-19) for n>20
EXAMPLE
Some solutions for n=5
..0..1..1. .0..1..0. .0..1..0. .0..0..0. .0..0..1. .0..1..0. .0..1..0
..1..0..0. .0..1..0. .1..0..1. .0..0..0. .0..0..1. .1..1..1. .1..1..1
..1..0..0. .1..1..1. .0..0..0. .0..0..0. .0..0..1. .0..1..0. .0..1..0
..1..0..0. .0..1..0. .1..0..1. .1..1..1. .0..0..1. .1..0..0. .0..0..1
..0..1..1. .0..1..0. .1..0..1. .1..1..1. .0..0..1. .1..0..1. .1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 20 2018
STATUS
approved