OFFSET
1,1
COMMENTS
Column 4 of A297993.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) -6*a(n-2) +2*a(n-3) -5*a(n-4) +10*a(n-5) -19*a(n-6) -30*a(n-7) +29*a(n-8) +61*a(n-9) +81*a(n-10) -91*a(n-11) -78*a(n-12) -35*a(n-13) +86*a(n-14) +10*a(n-15) -35*a(n-16) -23*a(n-17) +16*a(n-18) +37*a(n-19) -32*a(n-20) +14*a(n-21) +6*a(n-22) -8*a(n-23) +4*a(n-24) for n>27
EXAMPLE
Some solutions for n=7
..0..1..0..0. .0..1..0..0. .0..0..0..0. .0..1..0..0. .0..0..0..0
..0..1..0..0. .0..1..0..1. .1..1..1..1. .0..0..1..0. .1..1..1..0
..0..1..1..1. .1..1..0..1. .1..0..0..1. .1..1..1..0. .0..0..0..1
..1..0..0..0. .1..0..0..1. .0..1..0..1. .0..0..0..0. .0..1..1..0
..0..1..1..1. .0..1..1..1. .0..1..1..1. .0..1..1..1. .0..1..0..0
..1..0..0..0. .1..0..0..0. .0..1..0..1. .1..0..0..0. .0..1..0..1
..0..1..1..1. .1..1..1..1. .0..1..0..0. .1..1..1..1. .1..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 10 2018
STATUS
approved