OFFSET
1,1
COMMENTS
Column 5 of A202939.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/1680)*n^8 + (17/210)*n^7 + (134/45)*n^6 + (256/5)*n^5 + (352481/720)*n^4 + (55381/20)*n^3 + (32201731/2520)*n^2 + (19670981/420)*n + 97073.
Conjectures from Colin Barker, Jun 03 2018: (Start)
G.f.: x*(160000 - 1166317*x + 3778651*x^2 - 7066186*x^3 + 8314586*x^4 - 6291988*x^5 + 2987174*x^6 - 812969*x^7 + 97073*x^8) / (1 - x)^9.
a(n) = 9*a(n-1) - 36*a(n-2) + 84*a(n-3) - 126*a(n-4) + 126*a(n-5) - 84*a(n-6) + 36*a(n-7) - 9*a(n-8) + a(n-9) for n>9.
(End)
EXAMPLE
Some solutions for n=1:
..0..0..0..0..0..1..1..1....0..0..0..0..1..0..0..1....0..0..0..0..0..0..0..0
..0..0..0..0..1..1..0..0....0..0..0..0..1..1..1..0....0..0..0..0..0..0..0..1
..0..0..0..0..0..1..1..1....0..0..0..0..1..0..0..0....0..0..0..0..0..1..1..1
..0..0..0..0..1..0..0..1....0..0..0..0..0..0..0..0....0..0..0..0..0..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 26 2011
STATUS
approved