A200153 Number of 0..7 arrays x(0..n-1) of n elements with zero n-1st difference.

1, 8, 32, 158, 636, 3000, 11370, 52166, 194818, 841122, 3338446, 18901856, 57842348, 378064896, 1073497924, 3840517750, 15453709184, 133757694784, 361144763380, 2500726090816, 6776168788838, 17399866594576, 65044240487692

Offset: 1

Author

R. H. Hardin Nov 13 2011

Keywords

• nonn

Comments

Column 7 of A200154

Examples

			Some solutions for n=6
..5....1....5....1....5....6....4....4....6....0....2....3....7....5....5....5
..0....7....7....0....4....5....0....2....1....0....1....6....5....0....2....3
..3....4....3....0....7....1....3....3....6....3....0....7....5....0....4....5
..6....2....2....0....7....0....4....3....6....3....2....5....4....2....4....6
..5....3....4....1....4....3....2....2....0....0....5....2....3....4....1....4
..0....1....0....6....5....6....4....4....1....0....2....3....7....5....0....0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..26