OFFSET
1,1
COMMENTS
Column 4 of A259427
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 18*a(n-1) +34*a(n-2) -1078*a(n-3) -384*a(n-4) +17595*a(n-5) -3702*a(n-6) -104436*a(n-7) +47348*a(n-8) +254812*a(n-9) -155015*a(n-10) -240597*a(n-11) +170095*a(n-12) +72147*a(n-13) -60513*a(n-14) -2266*a(n-15) +6147*a(n-16) -594*a(n-17) -142*a(n-18) +25*a(n-19) -a(n-20)
EXAMPLE
Some solutions for n=3
..0..0..1..1..0....0..1..1..1..1....0..0..1..1..0....1..0..1..0..0
..1..0..0..0..0....0..1..0..1..0....1..1..1..0..0....1..1..1..0..1
..0..0..0..0..0....0..1..0..1..0....0..0..1..0..0....0..0..1..0..0
..0..0..0..0..0....0..0..0..1..1....1..0..0..0..0....0..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 26 2015
STATUS
approved