OFFSET
1,1
COMMENTS
Column 6 of A222127.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) + a(n-3) + a(n-5) + 2*a(n-7) - a(n-8) - a(n-14) + a(n-15).
Empirical g.f.: x*(2 + x + x^2 + 2*x^3 + x^4 + x^5 + x^6 - 2*x^7 - x^10 - x^12 + x^14) / ((1 - x + x^2)*(1 - x^2 - 2*x^3 - x^4 + x^6 - x^7 - x^8 + x^10 + x^11 - x^13)). - Colin Barker, Aug 15 2018
EXAMPLE
Some solutions for n=7, one extended zero followed by filtered positions:
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....0....0....1....0....0....1....0....1....0....1....1....0....1....0....1
..0....0....0....0....0....1....0....0....0....1....0....0....0....0....1....0
..0....0....1....0....0....0....1....0....1....0....0....1....1....0....0....0
..0....0....0....1....0....1....0....1....0....0....0....0....0....1....0....0
..0....1....0....0....0....0....0....0....0....0....1....0....0....0....1....0
..1....0....1....1....0....0....0....1....1....1....0....0....0....0....0....0
..0....0....0....0....1....0....1....0....0....0....1....0....1....0....0....1
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 08 2013
STATUS
approved