A200157 Number of 0..n arrays x(0..5) of 6 elements with zero 5th difference.

8, 39, 112, 275, 730, 1589, 3000, 5181, 8350, 13871, 21588, 32019, 45682, 63225, 88580, 120521, 159996, 208123, 266020, 342493, 433532, 540855, 666180, 811455, 992870, 1201725, 1440468, 1711817, 2018490, 2387707, 2803024, 3268059, 3786430

Offset: 1

Author

R. H. Hardin Nov 13 2011

Keywords

• nonn

Comments

Row 6 of A200154

Examples

			Some solutions for n=6
..0....2....1....6....5....1....3....2....6....5....4....5....1....2....6....6
..5....4....3....1....3....0....3....4....3....4....4....5....1....0....6....1
..5....5....5....4....5....3....2....3....1....0....2....4....1....0....2....0
..4....4....5....4....4....4....1....4....3....1....3....3....2....1....0....0
..4....2....4....0....0....2....1....6....6....6....6....2....3....2....1....1
..5....2....6....1....0....1....3....2....1....5....4....0....1....2....1....6
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n) = 2*a(n-1) -a(n-2) +2*a(n-5) -4*a(n-6) +2*a(n-7) +a(n-10) -2*a(n-11) +a(n-12) -4*a(n-15) +8*a(n-16) -4*a(n-17) +a(n-20) -2*a(n-21) +a(n-22) +2*a(n-25) -4*a(n-26) +2*a(n-27) -a(n-30) +2*a(n-31) -a(n-32)