OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 10*a(n-1) -16*a(n-2) -118*a(n-3) +321*a(n-4) +560*a(n-5) -1724*a(n-6) -1636*a(n-7) +3492*a(n-8) +2984*a(n-9) -1216*a(n-10) -608*a(n-11) +192*a(n-12)
EXAMPLE
Some solutions for n=5
..0....2...-2...-1....1...-1....0....2....2....0....0...-1....2....0....0....0
.-2...-1....1....1....0...-2...-2....0....1....0....1....0....0....2...-1....0
..2...-2....2...-2...-2....2....0....2...-2....0....0...-1....0....0....2....2
..1....1...-1....2...-1...-2...-1....0....2...-2....0....1....0....2....0....0
..2....0....2...-1....0...-1...-2....0....1...-1....0....2....0....0....2....1
..1....0...-1....2...-1...-2....0...-1...-2....0...-1...-2....1...-1...-1...-2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 12 2012
STATUS
approved