OFFSET
1,1
COMMENTS
Column 7 of A223777
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/87178291200)*n^14 + (1/4151347200)*n^13 + (1/106444800)*n^12 + (53/319334400)*n^11 + (409/87091200)*n^10 + (1681/29030400)*n^9 + (862999/609638400)*n^8 - (56411/29030400)*n^7 + (3673639/14515200)*n^6 - (4250857/7257600)*n^5 + (1960444733/119750400)*n^4 - (326164913/4989600)*n^3 + (89807927381/151351200)*n^2 - (113103797/51480)*n + 3030 for n>4
EXAMPLE
Some solutions for n=3
..0..1..0..0..0..0..0....0..0..0..0..1..1..0....0..0..0..0..0..0..0
..1..1..1..1..1..1..0....0..0..0..1..1..1..0....0..0..0..0..1..1..1
..1..1..1..1..1..1..0....0..0..1..1..1..1..1....1..1..1..1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved