OFFSET
1,1
COMMENTS
Column 3 of A222340.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 165*a(n-1) - 774*a(n-2).
Empirical g.f.: 6*x*(6 - 29*x) / (1 - 165*x + 774*x^2). - Colin Barker, Mar 15 2018
EXAMPLE
Some solutions for n=3:
..0..0..2....0..0..1....0..0..1....0..0..2....0..0..3....0..0..2....0..0..5
..3..3..0....0..1..2....1..2..5....1..1..6....2..2..5....3..0..3....0..3..6
..1..1..4....5..3..6....6..6..1....4..1..2....4..0..0....0..3..4....3..5..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 15 2013
STATUS
approved