OFFSET
1,1
COMMENTS
Column 4 of A306166.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +4*a(n-2) -a(n-4) -17*a(n-5) -22*a(n-6) +2*a(n-7) +38*a(n-8) +42*a(n-9) -5*a(n-10) -5*a(n-11) -9*a(n-12) -24*a(n-13) -26*a(n-14) -20*a(n-15) +6*a(n-16) +20*a(n-17) +16*a(n-18) for n>23
EXAMPLE
Some solutions for n=5
..0..0..0..0. .0..1..0..0. .0..0..1..1. .0..0..0..1. .0..0..1..1
..1..0..0..1. .0..0..0..0. .0..0..1..1. .0..0..1..0. .0..1..0..1
..0..0..0..0. .0..0..0..0. .1..1..1..1. .0..0..0..0. .1..0..1..1
..1..0..0..0. .0..0..0..1. .1..1..1..1. .1..0..0..1. .1..1..1..1
..0..0..1..0. .0..1..0..0. .1..1..1..1. .0..0..0..0. .1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 23 2018
STATUS
approved