OFFSET
1,2
COMMENTS
Diagonal of A221463.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..71
FORMULA
a(n) = [x^n] 1/(1 - x*Sum_{k>=1} n^k*x^k). - Ilya Gutkovskiy, Mar 21 2018
EXAMPLE
Some solutions for n=6
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..2....4....5....6....4....1....3....4....1....2....5....5....2....6....2....3
..3....0....5....0....3....5....1....1....2....2....3....4....3....4....3....4
..6....3....2....1....1....6....2....2....6....4....6....5....4....1....6....1
..2....6....3....0....3....4....6....3....3....0....1....1....2....2....5....5
..0....2....2....1....6....1....1....6....1....4....4....5....4....5....2....3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2013
STATUS
approved