OFFSET
1,1
COMMENTS
Row 5 of A214352
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..64
FORMULA
Empirical: a(n) = (250321/163459296000)*n^15 + (57931/605404800)*n^14 + (6130183/2335132800)*n^13 + (5021701/119750400)*n^12 + (12225673/28066500)*n^11 + (33845911/10886400)*n^10 + (1793738911/114307200)*n^9 + (1441174417/25401600)*n^8 + (3431403169/23328000)*n^7 + (2949422359/10886400)*n^6 + (31221432373/89812800)*n^5 + (4515147647/14968800)*n^4 + (193448384201/1135134000)*n^3 + (4506398063/75675600)*n^2 + (2113313/180180)*n + 1
EXAMPLE
Some solutions for n=2
......2..........2..........1..........1..........2..........1..........1
.....2.1........1.2........1.2........0.2........2.1........2.0........1.0
....2.2.1......0.2.1......1.2.2......0.1.2......2.1.0......2.2.0......2.1.0
...0.2.0.2....0.2.0.2....1.2.2.2....1.0.2.1....2.1.0.1....2.2.0.2....0.2.0.1
..1.0.2.0.2..0.1.2.0.2..1.2.2.2.1..0.1.0.2.1..2.0.2.0.1..2.2.0.1.2..1.0.2.0.1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 13 2012
STATUS
approved