OFFSET
1,1
COMMENTS
Row 7 of A211561
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/46080)*n^12 + (13/23040)*n^11 + (33/5120)*n^10 + (9241/207360)*n^9 + (10423/46080)*n^8 + (478007/483840)*n^7 + (61073/15360)*n^6 + (197717/13824)*n^5 + (504739/11520)*n^4 + (1139725/10368)*n^3 + (102469/480)*n^2 + (361919/1260)*n + 203
Empirical: a(n) = sum{j in n..n+6}stirling2(n+6,j)
EXAMPLE
Some solutions for n=5
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....0....1....0....0....0....0....1....0....1....1....0....0....1....0....0
..0....1....0....1....1....1....1....0....0....0....0....1....1....0....1....1
..1....2....2....2....2....2....1....2....0....2....1....2....2....2....2....0
..2....3....0....1....3....3....2....1....1....0....2....0....1....1....2....1
..3....3....0....0....0....2....3....2....2....3....3....2....3....2....3....2
..4....1....2....1....2....4....1....3....2....3....2....3....1....1....4....2
..5....0....1....3....4....5....3....2....3....0....1....3....4....3....1....3
..0....1....0....2....1....3....0....4....1....3....4....4....2....2....2....4
..0....4....3....4....5....0....4....3....3....4....5....5....4....4....1....0
..4....1....4....1....5....5....5....0....4....2....6....6....0....0....4....3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 15 2012
STATUS
approved