OFFSET
1,1
COMMENTS
Column 4 of A296725.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +7*a(n-2) +31*a(n-3) -103*a(n-4) -134*a(n-5) -197*a(n-6) +354*a(n-7) +31*a(n-8) -17*a(n-9) -3*a(n-10) +404*a(n-11) +53*a(n-12) -162*a(n-13) +194*a(n-14) +92*a(n-15) -37*a(n-16) -24*a(n-17) -4*a(n-18)
EXAMPLE
Some solutions for n=5
..0..1..0..0. .1..0..0..0. .1..0..1..1. .0..0..1..0. .0..0..0..0
..0..0..0..1. .0..0..0..1. .0..0..0..1. .0..0..0..0. .0..0..1..0
..0..0..0..0. .1..0..0..0. .0..0..1..1. .1..0..0..0. .1..1..1..0
..0..0..1..1. .1..1..0..0. .1..0..0..0. .0..0..1..1. .1..0..0..0
..1..0..0..1. .0..0..0..0. .0..0..1..0. .1..0..1..0. .0..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2017
STATUS
approved