OFFSET
1,1
COMMENTS
Column 1 of A233939
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 10*a(n-1) +56*a(n-2) -828*a(n-3) +457*a(n-4) +18458*a(n-5) -42836*a(n-6) -129360*a(n-7) +480656*a(n-8) +107168*a(n-9) -1616128*a(n-10) +780160*a(n-11) +1960960*a(n-12) -1441792*a(n-13) -809984*a(n-14) +628736*a(n-15) +122880*a(n-16) -65536*a(n-17)
EXAMPLE
Some solutions for n=4
..2..3....6..1....2..3....6..6....5..0....5..7....2..7....3..4....2..7....5..6
..6..1....6..5....5..0....1..5....3..2....2..6....5..6....6..1....5..6....4..1
..2..1....2..7....1..0....0..0....7..2....1..3....6..1....2..3....6..1....5..6
..3..6....3..2....5..0....5..1....5..4....2..6....3..2....5..0....3..2....1..4
..2..1....5..0....4..5....5..1....7..2....2..6....7..4....0..1....7..2....5..6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2013
STATUS
approved