OFFSET
1,1
COMMENTS
Column 4 of A201088
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) -2*a(n-2) -9*a(n-3) +27*a(n-4) -25*a(n-5) -48*a(n-6) +46*a(n-7) -7*a(n-8) -47*a(n-9) +49*a(n-10) +54*a(n-11) -16*a(n-12) -21*a(n-13) +10*a(n-14) +21*a(n-15) +9*a(n-16) -11*a(n-17) -9*a(n-18) +2*a(n-19) +3*a(n-20) -5*a(n-22) -3*a(n-23) +2*a(n-24) -a(n-26)
EXAMPLE
Some solutions for n=6
..1...-3....3....2...-1....3...-2....3....0....4....4...-2....4....3....1....0
..1...-2...-1....0....1...-1....2...-1....1....3....4...-1....4....1....0....1
..1....0...-2...-2....4...-1....2...-2....2....0....3...-3....2...-2...-1....2
.-1....0...-1...-3....4....1....3...-2...-1...-3...-1...-4....3...-1...-4....1
..1....0....1....0....2....0....3....1...-3...-2...-1...-1....4...-1...-3....1
..1....0....1....0...-1....1....2....0...-4...-3....2....3....3...-3....0...-1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 26 2011
STATUS
approved