OFFSET
1,1
COMMENTS
Column 4 of A303808.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -4*a(n-2) -a(n-3) +9*a(n-4) -25*a(n-5) +34*a(n-6) -21*a(n-7) -17*a(n-8) +20*a(n-9) -9*a(n-10) +80*a(n-11) -82*a(n-12) +5*a(n-13) +115*a(n-14) -65*a(n-15) -48*a(n-16) +9*a(n-17) -5*a(n-18) +2*a(n-20) for n>24
EXAMPLE
Some solutions for n=5
..0..0..1..1. .0..1..1..1. .0..1..1..1. .0..1..0..1. .0..1..1..1
..0..0..0..1. .1..1..1..1. .0..0..1..1. .1..1..0..0. .1..1..1..1
..0..0..0..0. .1..1..1..1. .0..0..1..0. .1..1..0..0. .1..1..1..1
..1..0..0..0. .1..1..1..1. .0..1..1..0. .1..1..0..0. .0..1..1..1
..1..1..0..0. .0..1..1..0. .1..1..1..1. .1..0..1..0. .0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 30 2018
STATUS
approved