OFFSET
1,1
COMMENTS
Column 3 of A298154.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +3*a(n-2) +10*a(n-3) -28*a(n-4) -18*a(n-5) -8*a(n-6) +63*a(n-7) +42*a(n-8) -52*a(n-9) +9*a(n-10) +26*a(n-11) -23*a(n-12) -43*a(n-13) -11*a(n-14) -20*a(n-15) +9*a(n-16) +18*a(n-17) +2*a(n-18) for n>19
EXAMPLE
Some solutions for n=7
..0..1..0. .0..1..0. .0..0..1. .0..1..1. .0..0..1. .0..1..0. .0..0..0
..0..1..0. .1..1..1. .0..0..1. .0..1..1. .0..0..1. .1..1..1. .0..0..0
..0..0..0. .0..1..0. .0..1..1. .1..1..0. .1..1..1. .0..1..0. .0..0..0
..1..0..1. .1..1..0. .0..1..0. .0..1..1. .0..0..1. .1..1..0. .1..1..1
..1..0..1. .0..1..1. .1..1..0. .1..1..0. .0..0..1. .1..0..0. .1..1..1
..0..0..0. .1..1..0. .0..1..1. .0..1..1. .0..1..1. .1..1..0. .1..1..1
..0..0..1. .1..1..0. .0..1..1. .0..1..1. .0..1..1. .1..1..0. .1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 13 2018
STATUS
approved