OFFSET
1,1
COMMENTS
Row 5 of A224038.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/120)*n^5 + (1/24)*n^4 + (25/24)*n^3 + (227/24)*n^2 + (1289/20)*n - 7 for n>3.
Conjectures from Colin Barker, Aug 26 2018: (Start)
G.f.: x*(32 - 48*x - 86*x^2 + 220*x^3 - 124*x^4 - 12*x^5 + 9*x^6 + 17*x^7 - 7*x^8) / (1 - x)^6.
a(n) = 6*a(n-1) - 15*a(n-2) + 20*a(n-3) - 15*a(n-4) + 6*a(n-5) - a(n-6) for n>9.
(End)
EXAMPLE
Some solutions for n=3:
..0..0..1....0..0..0....1..1..1....0..0..1....1..1..1....0..0..0....0..1..1
..0..0..0....0..0..0....0..1..1....0..0..0....1..1..1....0..0..1....0..1..1
..0..0..1....0..1..1....0..1..1....0..0..0....0..1..1....0..0..1....0..1..1
..0..1..1....1..1..1....0..1..1....0..0..0....1..1..1....0..0..0....0..1..1
..0..0..1....1..1..1....0..1..1....0..1..1....0..1..1....0..1..1....1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 30 2013
STATUS
approved