OFFSET
1,1
COMMENTS
Column 7 of A223357
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5376*a(n-1) -5750784*a(n-2) +2038431744*a(n-3) -217432719360*a(n-4)
EXAMPLE
Some solutions for n=3
..0..3..0..3..1..2..5....0..3..0..3..1..2..4....0..3..0..3..4..2..4
..0..3..0..3..5..1..0....0..3..0..3..5..2..5....0..3..0..3..0..2..4
..0..3..0..3..0..1..5....0..3..0..3..0..3..0....0..3..0..3..4..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 19 2013
STATUS
approved