OFFSET
1,2
COMMENTS
Column 4 of A296541.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) -13*a(n-2) +21*a(n-3) -22*a(n-4) +7*a(n-5) +18*a(n-6) -37*a(n-7) -34*a(n-8) +111*a(n-9) -210*a(n-10) +91*a(n-11) +161*a(n-12) -194*a(n-13) +84*a(n-14) +464*a(n-15) -73*a(n-16) +283*a(n-17) +265*a(n-18) -165*a(n-19) -208*a(n-20) -363*a(n-21) -705*a(n-22) -701*a(n-23) -687*a(n-24) -589*a(n-25) -418*a(n-26) -171*a(n-27) -30*a(n-28) +142*a(n-29) +214*a(n-30) +244*a(n-31) +218*a(n-32) +175*a(n-33) +114*a(n-34) +69*a(n-35) +34*a(n-36) +14*a(n-37) +4*a(n-38) +a(n-39)
EXAMPLE
Some solutions for n=7
..0..0..1..0. .0..1..0..0. .1..1..0..0. .1..1..1..0. .0..1..1..0
..1..1..1..0. .1..1..0..0. .1..0..0..0. .1..1..0..0. .0..1..0..0
..1..0..0..1. .0..0..1..0. .0..1..1..1. .1..0..0..0. .0..0..0..0
..0..0..1..1. .1..1..1..0. .0..1..1..0. .0..1..1..0. .0..0..0..0
..0..0..0..0. .1..0..0..0. .0..1..0..0. .0..1..0..0. .1..1..1..0
..0..0..1..0. .0..1..0..0. .0..0..0..1. .1..1..0..0. .1..1..0..0
..0..1..1..0. .1..1..0..0. .0..0..1..1. .0..0..0..0. .1..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 15 2017
STATUS
approved