OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +10*a(n-2) -35*a(n-3) -35*a(n-4) +160*a(n-5) +45*a(n-6) -365*a(n-7) +6*a(n-8) +437*a(n-9) -55*a(n-10) -260*a(n-11) +30*a(n-12) +60*a(n-13)
EXAMPLE
Some solutions for n=5
.-2...-4....4....1....2....2....0....0....2...-4....1....0....3....0....0....0
..2....0....2....2....0....0....3....0....0...-3....0....4....2....2...-1...-3
..0....4....4....1....0....0....0....4....2...-2....1...-4....1...-2....1....0
.-2....0....2....2....2....0....0....0...-2...-1....2....4....2....0....0....0
..2....0....0....3....0...-4....0....0....0....0....3....0....1...-2....1...-3
.-2....4....2....4...-1....0....0...-4....2...-1....4....4....0....0...-1....0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 18 2012
STATUS
approved