OFFSET
1,1
COMMENTS
Column 1 of A207799.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) + 61*a(n-2) + 83*a(n-3) + 272*a(n-4) + 336*a(n-5).
Empirical g.f.: 32*x*(8 + 61*x + 93*x^2 + 240*x^3 + 252*x^4) / (1 - x - 61*x^2 - 83*x^3 - 272*x^4 - 336*x^5). - Colin Barker, Jun 25 2018
EXAMPLE
Some solutions for n=4:
..2..0....3..0....1..0....3..3....0..1....2..0....2..1....2..0....1..0....1..3
..1..0....2..0....0..0....0..1....0..0....2..2....2..3....2..2....0..3....2..1
..0..0....3..1....1..2....2..3....1..2....1..3....0..1....1..0....0..1....2..0
..1..2....2..1....2..1....2..0....3..0....0..1....2..1....3..2....1..1....3..2
..1..1....3..2....0..1....1..1....1..1....2..2....0..2....3..0....2..3....3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 20 2012
STATUS
approved