OFFSET
1,1
COMMENTS
Column 5 of A223770
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/3628800)*n^10 - (1/241920)*n^9 + (23/120960)*n^8 - (43/40320)*n^7 + (11293/172800)*n^6 - (1721/2304)*n^5 + (1557823/181440)*n^4 - (3058823/60480)*n^3 + (99347/350)*n^2 - (196177/210)*n + 1664 for n>6
EXAMPLE
Some solutions for n=3
..0..1..0..0..0....0..0..1..1..0....0..0..0..0..0....0..0..0..0..0
..0..1..1..0..0....0..0..1..1..1....0..1..1..0..0....0..0..0..0..1
..0..1..1..1..1....0..0..0..1..1....0..0..1..1..0....0..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved