OFFSET
1,1
COMMENTS
Column 6 of A208269
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 36*a(n-1) +120*a(n-2) -2391*a(n-3) -3905*a(n-4) +50702*a(n-5) +27152*a(n-6) -396016*a(n-7) +154999*a(n-8) +751787*a(n-9) -499260*a(n-10) -410368*a(n-11) +355981*a(n-12) +38077*a(n-13) -70276*a(n-14) +6203*a(n-15) +3386*a(n-16) -622*a(n-17) +28*a(n-18)
EXAMPLE
Some solutions for n=4
..0..0..0..1..1..0....0..0..0..0..0..0....0..0..0..1..0..0....0..0..0..1..0..0
..0..1..1..1..0..1....1..0..1..0..1..0....0..1..1..1..0..1....0..1..1..0..0..1
..1..0..1..0..1..0....0..0..1..0..1..1....0..0..0..1..0..1....0..1..0..0..1..1
..1..1..0..0..0..0....0..1..0..0..1..0....1..1..1..0..1..0....0..1..1..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2012
STATUS
approved