OFFSET
1,1
COMMENTS
Row 4 of A209650
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) -11*a(n-2) -108*a(n-3) +272*a(n-4) +480*a(n-5) -1754*a(n-6) -942*a(n-7) +5482*a(n-8) +552*a(n-9) -9304*a(n-10) +888*a(n-11) +8539*a(n-12) -1755*a(n-13) -3871*a(n-14) +1092*a(n-15) +648*a(n-16) -216*a(n-17) for n>18
EXAMPLE
Some solutions for n=4
..1..1..1..1....1..0..1..0....1..0..1..0....1..1..0..1....1..0..1..1
..1..1..1..1....1..0..1..0....0..0..0..0....0..0..0..0....1..1..0..1
..1..1..1..1....1..0..1..0....0..0..0..0....0..0..0..0....0..1..0..1
..1..1..1..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 11 2012
STATUS
approved