OFFSET
1,1
COMMENTS
Column 4 of A203732
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..19
FORMULA
Empirical: a(n) = 141*a(n-1) +34391*a(n-2) -1914087*a(n-3) -5360404*a(n-4) +185626112*a(n-5) +226020536*a(n-6) -801895584*a(n-7)
EXAMPLE
Some solutions for n=4
..3..6..2..5..1....1..1..7..7..0....1..2..4..2..6....3..1..0..0..5
..3..3..6..2..5....3..1..1..7..7....1..1..2..6..2....1..1..1..0..0
..7..3..3..6..2....5..3..1..1..7....0..1..1..2..0....7..1..7..1..0
..2..7..3..3..6....2..5..3..1..1....1..2..1..1..2....4..7..7..7..1
..0..2..7..3..3....6..2..5..3..1....5..1..1..7..1....1..4..7..0..7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2012
STATUS
approved