OFFSET
1,1
COMMENTS
Row 4 of A223961
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/1036800)*n^12 + (1/34560)*n^11 + (4379/7257600)*n^10 + (757/80640)*n^9 + (257687/2419200)*n^8 + (82939/80640)*n^7 + (8187071/1036800)*n^6 + (1661651/34560)*n^5 + (117000427/453600)*n^4 + (10787803/20160)*n^3 - (153061829/50400)*n^2 + (3421969/840)*n + 275 for n>5
EXAMPLE
Some solutions for n=3
..0..1..1....1..2..2....0..1..1....0..0..1....0..1..2....0..0..2....0..1..2
..0..2..3....1..2..3....1..1..2....1..3..3....0..3..3....0..2..3....0..3..3
..2..3..3....1..1..3....0..2..2....1..1..3....1..2..3....0..1..2....1..1..3
..2..2..3....0..1..3....0..2..3....0..1..2....1..3..3....1..3..3....0..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 29 2013
STATUS
approved