OFFSET
1,1
COMMENTS
Column 5 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) + a(n-8) + a(n-10) + 2*a(n-12) - a(n-13).
Empirical g.f.: x*(1 + x + x^2)*(2 - x + 3*x^3 - 2*x^4 + 3*x^6 - 2*x^7 + x^8 + 2*x^9 - x^10) / (1 - x - x^3 - x^5 - x^8 - x^10 - 2*x^12 + 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
..0....1....0....1....1....1....1....0....0....0....0....0....0....0....0....0
..0....0....1....0....0....0....0....0....0....1....0....1....0....1....1....0
..0....0....0....0....1....0....0....0....0....0....1....0....0....0....0....0
..0....0....1....0....0....1....0....0....1....0....0....0....1....0....0....0
..0....1....0....0....0....0....0....0....0....0....0....0....0....1....1....1
..1....0....0....0....1....1....1....0....0....0....1....1....1....0....0....0
..0....0....1....1....0....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
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 08 2013
STATUS
approved