OFFSET
1,1
COMMENTS
Row 4 of A245995.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +a(n-2) -11*a(n-3) +6*a(n-4) +14*a(n-5) -14*a(n-6) -6*a(n-7) +11*a(n-8) -a(n-9) -3*a(n-10) +a(n-11).
Empirical: G.f.: -2*x*(1 +10*x +158*x^2 +502*x^3 +1436*x^4 +1510*x^5 +1498*x^6 +474*x^7 +171*x^8) / ( (1+x)^4*(x-1)^7 ). - R. J. Mathar, Aug 10 2014
EXAMPLE
Some solutions for n=8
..1....2....1....3....2....0....0....1....1....0....4....0....2....5....5....3
..4....7....3....2....0....2....2....5....1....7....1....2....2....2....2....7
..5....5....4....1....7....1....5....5....5....6....6....3....7....1....5....7
..6....5....1....4....2....8....4....7....8....5....3....4....7....8....7....5
..8....0....5....0....2....1....8....7....4....4....6....1....4....5....0....2
..4....1....6....1....7....8....7....4....6....7....1....1....7....5....6....2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 09 2014
STATUS
approved