OFFSET
1,1
COMMENTS
Row 6 of A188333
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n)=2*a(n-1)-a(n-3)-a(n-5)+2*a(n-8)-a(n-11)-a(n-13)+2*a(n-15)-a(n-16).
Empirical: G.f. -x*(-197 -30*x +20*x^2 -29*x^3 +33*x^4 -37*x^5 -64*x^6 -157*x^7 +5*x^8 +27*x^9 +84*x^10 +24*x^11 +67*x^12 -46*x^13 -130*x^14 +78*x^15) / ( (1+x+x^2) *(x^4+x^3+x^2+x+1) *(x^2+1) *(1+x)^2 *(x-1)^6 ). - R. J. Mathar, Mar 28 2011
EXAMPLE
Some solutions for n=6
-10..-10...-3...-9...-7...-9...-9...-6...-7...-5...-7...-4...-6...-5...-9...-9
.-4...-6...-2...-3...-6...-1...-9...-6...-5...-4...-3...-3...-2...-5...-8...-7
..1...-1...-2...-1...-2...-1...-4....1...-5...-4...-1...-1...-2...-2...-2....2
..2....5....1...-1....1...-1....4....1....4....2....2....2....3...-2....4....3
..4....5....3....4....4....6....9....4....5....4....4....3....3....6....5....4
..7....7....3...10...10....6....9....6....8....7....5....3....4....8...10....7
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 28 2011
STATUS
approved