OFFSET
1,1
COMMENTS
Column 1 of A263506.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) -2*a(n-2) -12*a(n-3) -18*a(n-4) -138*a(n-5) +58*a(n-6) +109*a(n-7) +35*a(n-8) +97*a(n-9) -36*a(n-10) -60*a(n-11) +4*a(n-12) -2*a(n-13) +a(n-15).
EXAMPLE
Some solutions for n=4
..0..1....0..5....0..5....0..1....0..1....1..2....0..1....0..5....1..3....0..3
..2..4....2..1....1..3....2..7....2..3....5..0....2..5....1..4....2..0....1..2
..5..3....3..7....2..4....3..5....4..6....7..3....3..7....2..3....6..5....4..7
..6..8....4..6....8..6....4..9....7..5....8..4....6..4....6..9....7..4....5..8
..7..9....9..8....9..7....8..6....8..9....9..6....9..8....8..7....9..8....9..6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 19 2015
STATUS
approved