OFFSET
1,1
COMMENTS
Row 6 of A255660
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/39916800)*n^11 + (1/302400)*n^10 + (143/725760)*n^9 + (137/20160)*n^8 + (686191/1209600)*n^7 + (68821/4800)*n^6 + (118924709/725760)*n^5 + (37326349/60480)*n^4 + (9666601859/907200)*n^3 - (165778309/8400)*n^2 + (24588142/3465)*n - 6396 for n>4
EXAMPLE
Some solutions for n=2
..1....2....0....0....1....2....1....0....0....2....3....3....2....2....2....3
..0....3....3....1....1....3....1....0....2....0....2....1....3....3....3....3
..3....3....2....1....0....2....0....3....3....2....2....1....0....1....1....0
..3....0....0....3....0....3....2....0....3....2....3....1....0....3....3....3
..1....2....0....0....2....1....2....3....1....1....1....2....2....1....0....2
..0....3....0....1....0....3....2....0....2....3....2....3....1....3....3....3
..2....2....0....1....2....1....1....1....3....2....1....1....0....1....3....0
..0....1....0....1....3....2....1....1....0....3....0....1....0....2....0....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2015
STATUS
approved