OFFSET
1,1
COMMENTS
Column 4 of A208028
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +a(n-2) +20*a(n-3) +27*a(n-4) +34*a(n-5) -21*a(n-6) -105*a(n-7) -149*a(n-8) +6*a(n-9) +254*a(n-10) +227*a(n-11) -101*a(n-12) -242*a(n-13) -93*a(n-14) +86*a(n-15) +77*a(n-16) +15*a(n-17) -34*a(n-18) -9*a(n-19) -5*a(n-20) +7*a(n-21) -2*a(n-22) -a(n-24) for n>25
EXAMPLE
Some solutions for n=4
..1..0..1..0....1..1..1..1....0..1..0..1....0..1..1..0....0..1..1..1
..0..1..1..0....1..1..1..0....0..1..1..0....1..1..0..0....1..1..0..1
..0..1..0..1....1..0..1..0....1..1..0..0....0..1..0..1....1..1..0..1
..1..1..0..1....1..0..1..1....0..1..0..1....0..1..1..1....1..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 22 2012
STATUS
approved