OFFSET
1,1
COMMENTS
Row 5 of A223669.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (359/453600)*n^10 - (391/18144)*n^9 + (5825/12096)*n^8 - (13241/3780)*n^7 - (41189/675)*n^6 + (10637083/4320)*n^5 - (1341019765/36288)*n^4 + (7101447161/22680)*n^3 - (37771550507/25200)*n^2 + (2233774483/630)*n - 2534086 for n>12.
EXAMPLE
Some solutions for n=4
..1..1..1..0....0..0..1..1....0..0..0..1....1..1..1..1....0..0..1..1
..0..1..0..0....0..0..1..0....0..1..1..1....0..1..1..0....0..1..1..1
..0..0..0..0....0..1..1..0....1..1..1..0....0..0..1..1....0..0..1..1
..0..0..0..0....1..1..1..0....0..1..1..1....0..0..0..1....0..0..1..1
..0..0..0..0....1..1..0..0....1..0..0..0....0..0..0..0....0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 25 2013
STATUS
approved