OFFSET
1,1
COMMENTS
Column 7 of A202447.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +a(n-2) -11*a(n-3) +6*a(n-4) +14*a(n-5) -14*a(n-6) -6*a(n-7) +11*a(n-8) -a(n-9) -3*a(n-10) +a(n-11) for n>12.
Empirical g.f.: 2*x*(444 - 548*x - 970*x^2 + 2241*x^3 + 446*x^4 - 3172*x^5 + 1138*x^6 + 1774*x^7 - 1346*x^8 - 192*x^9 + 416*x^10 - 103*x^11) / ((1 - x)^7*(1 + x)^4). - Colin Barker, May 31 2018
EXAMPLE
Some solutions for n=4:
..1..1..1..1..1..1..1..1..1....1..0..1..1..1..1..1..1..1
..1..0..1..0..0..0..0..0..0....1..0..1..0..0..0..0..0..0
..1..1..1..1..1..1..1..1..1....1..0..1..1..1..1..1..1..1
..1..0..1..0..1..0..0..0..0....1..0..1..0..1..0..1..0..1
..1..0..1..1..1..1..1..1..1....1..0..1..1..1..1..1..1..1
..1..0..1..1..1..1..1..1..1....1..0..1..0..1..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2011
STATUS
approved