OFFSET
1,2
COMMENTS
Column 3 of A296963.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) -10*a(n-2) +35*a(n-3) -116*a(n-4) +105*a(n-5) -196*a(n-6) +548*a(n-7) -320*a(n-8) +279*a(n-9) -955*a(n-10) +520*a(n-11) +159*a(n-12) +545*a(n-13) -530*a(n-14) -236*a(n-15) +188*a(n-16) +22*a(n-17) +6*a(n-18) -40*a(n-19) +25*a(n-20) -2*a(n-21)
EXAMPLE
Some solutions for n=5
..0..1..0. .0..1..1. .0..1..0. .1..1..0. .0..0..0. .0..1..1. .1..1..0
..1..1..0. .1..1..0. .1..1..1. .1..0..1. .0..1..0. .0..1..0. .0..1..0
..0..0..0. .0..0..0. .0..0..0. .0..0..1. .1..0..1. .0..0..0. .0..1..0
..1..1..1. .0..0..0. .0..1..1. .0..1..0. .1..1..0. .1..1..0. .1..0..1
..1..1..1. .0..0..0. .0..0..1. .1..1..0. .0..1..1. .0..1..1. .0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 22 2017
STATUS
approved