OFFSET
1,1
COMMENTS
Row 5 of A200763
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) -3*a(n-4) -3*a(n-5) +3*a(n-6) +3*a(n-7) +a(n-8) -3*a(n-9) -3*a(n-10) +a(n-11) +3*a(n-12) +3*a(n-13) -3*a(n-14) -3*a(n-15) +2*a(n-17) +a(n-18) -a(n-19)
Empirical g.f.: -x*(-6 -26*x -66*x^2 -123*x^3 -180*x^4 -228*x^5 -246*x^6 -250*x^7 -240*x^8 -222*x^9 -184*x^10 -129*x^11 -69*x^12 -21*x^13 -2*x^14 -x^15 -2*x^16 -x^17+x^18) / ( (x^2+1) *(x^4+1) *(1+x+x^2)^2 *(1+x)^3 *(x-1)^6 ). - R. J. Mathar, Nov 22 2011
EXAMPLE
Some solutions for n=8
..1....0....0....2....0....1....1....0....0....0....0....2....2....5....0....1
..5....2....0....2....0....1....1....4....1....3....8....4....3....7....2....6
..7....1....2....2....6....1....3....5....4....4....8....6....7....7....8....7
..5....3....8....3....3....8....3....5....3....4....8....8....4....8....7....5
..8....7....3....3....8....4....8....8....8....8....6....8....4....7....5....5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 22 2011
STATUS
approved