OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -5*a(n-2) +a(n-3) +2*a(n-4) -4*a(n-6) +4*a(n-7) +2*a(n-8) -4*a(n-9) +a(n-11) +2*a(n-12) -7*a(n-13) +6*a(n-14) +2*a(n-15) -3*a(n-16) +a(n-17) -5*a(n-19) +2*a(n-20) +3*a(n-21) +2*a(n-23) -2*a(n-24) -3*a(n-25) +a(n-27) +a(n-28) +a(n-29).
EXAMPLE
Some solutions for n=7, one extended zero followed by filtered positions
..1....1....1....1....0....0....1....1....1....0....0....0....0....0....1....1
..0....0....0....0....0....0....0....0....0....0....1....0....0....1....0....0
..1....1....0....1....0....1....1....0....0....1....0....0....0....0....0....1
..0....0....1....0....1....0....0....0....0....0....0....1....0....1....1....0
..0....0....0....1....0....0....0....1....1....0....0....0....0....0....0....0
..1....1....0....0....0....1....0....0....0....1....1....1....1....0....1....1
..0....0....0....0....0....0....0....1....0....0....0....0....0....1....0....0
..0....0....0....0....1....1....0....0....0....0....0....0....1....0....0....1
..1....0....1....1....0....0....1....0....0....0....0....0....0....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, Feb 06 2013
STATUS
approved