OFFSET
1,1
COMMENTS
Row 7 of A249883.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..20
FORMULA
Empirical: a(n) = n^13 - (10963/4620)*n^12 + (90131/7700)*n^11 - (265259/15120)*n^10 + (644381/15120)*n^9 - (442943/10080)*n^8 + (322067/6300)*n^7 + (1061/252)*n^6 - (62261/1008)*n^5 + (508283/6048)*n^4 - (1313561/37800)*n^3 - (21229/3080)*n^2 + (8746/1155)*n.
EXAMPLE
Some solutions for n=2
..2....2....2....0....2....0....2....2....2....0....1....1....1....2....2....2
..0....2....2....1....0....2....1....2....1....1....2....2....0....2....2....1
..2....2....1....2....0....2....0....2....2....2....2....2....0....0....2....2
..0....0....0....0....0....2....0....2....2....2....1....2....2....1....1....2
..1....0....0....2....2....2....0....1....2....0....0....0....2....0....0....2
..2....0....2....2....1....1....1....0....0....2....0....0....0....2....0....1
..2....2....0....0....2....1....1....0....0....2....0....0....2....0....0....0
..0....1....2....2....2....0....2....0....2....0....1....2....2....2....2....2
..2....2....1....1....2....2....1....2....0....0....2....2....0....2....2....0
..2....2....2....0....0....2....0....1....1....2....2....1....1....0....1....2
..1....0....2....2....0....2....0....1....2....2....2....2....0....2....2....0
..0....2....1....2....0....2....0....1....2....1....2....0....2....1....2....1
..0....0....2....2....1....0....2....0....2....0....0....2....0....2....1....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 07 2014
STATUS
approved