OFFSET
1,1
COMMENTS
Column 3 of A227263
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/90720)*n^9 + (11/40320)*n^8 + (53/30240)*n^7 + (73/2880)*n^6 + (301/4320)*n^5 - (2683/5760)*n^4 + (448811/90720)*n^3 + (1613/1120)*n^2 - (83207/2520)*n + 33 for n>5
EXAMPLE
Some solutions for n=4
..1..1..0....1..1..1....1..1..0....1..0..0....1..1..0....1..1..1....1..1..0
..1..1..1....1..0..0....1..1..1....0..1..0....0..1..1....1..0..1....1..1..1
..1..1..1....1..1..0....1..1..1....0..1..1....0..1..1....0..1..1....1..1..1
..0..0..0....0..1..0....1..1..1....0..0..1....0..0..1....0..0..1....0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 04 2013
STATUS
approved