OFFSET
1,2
COMMENTS
Column 1 of A263389.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-2) +15*a(n-3) +35*a(n-4) +25*a(n-5) +5*a(n-6) -5*a(n-7) -25*a(n-8) -35*a(n-9) -15*a(n-10) -5*a(n-11) +a(n-13)
EXAMPLE
Some solutions for n=4
..3..5....3..2....3..2....3..2....3..2....3..5....3..2....4..5....3..2....3..2
..1..0....1..0....6..4....5..7....1..7....1..0....1..7....1..0....1..0....1..0
..8..2....8..9....0..1....0..1....0..9....7..2....0..6....8..2....8..6....7..6
..9..4....5..4....9..8....9..8....5..8....9..8....9..8....9..3....9..4....9..8
..7..6....7..6....7..5....4..6....4..6....4..6....4..5....7..6....7..5....4..5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 16 2015
STATUS
approved