OFFSET
1,1
COMMENTS
Row 4 of A229774
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..42
FORMULA
Empirical: a(n) = (1/5040)*n^16 + (17/5040)*n^15 + (89/3360)*n^14 + (143/1120)*n^13 + (307/720)*n^12 + (307/288)*n^11 + (64247/30240)*n^10 + (53933/15120)*n^9 + (10645/2016)*n^8 + (71609/10080)*n^7 + (44/5)*n^6 + (14447/1440)*n^5 + (8975/864)*n^4 + (20359/2160)*n^3 + (3505/504)*n^2 + (1543/420)*n + 1
EXAMPLE
Some solutions for n=3
..2..2..0..0....2..0..0..0....0..0..0..0....0..0..0..0....2..2..0..0
..2..2..3..0....2..2..2..1....2..1..0..0....2..2..0..0....2..2..3..0
..3..1..0..0....2..2..2..2....2..2..3..1....2..2..0..0....3..2..0..1
..3..3..1..2....3..1..1..1....3..1..2..1....3..0..3..2....3..3..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 29 2013
STATUS
approved