OFFSET
1,2
COMMENTS
Column 7 of A211561
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = sum{j in 7..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....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1
..2....2....2....2....2....2....2....2....2....2....2....2....1....2....2....2
..3....3....3....3....3....0....3....3....0....0....3....3....2....3....3....0
..4....4....1....4....4....3....4....4....3....0....4....4....2....2....4....3
..5....0....4....5....3....4....3....3....3....3....5....5....3....0....0....1
..0....2....2....1....5....5....1....5....4....2....0....4....4....3....4....4
..4....4....5....6....1....6....4....6....1....4....0....6....1....4....3....3
..2....5....6....6....6....1....5....6....1....3....6....2....5....5....5....5
..6....0....1....6....3....5....3....3....5....5....6....1....1....6....3....6
..3....6....6....6....7....6....6....1....6....6....7....6....6....3....6....5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 15 2012
STATUS
approved