A250350 Number of length n arrays x(i), i=1..n with x(i) in i..i+7 and no value appearing more than 2 times.

8, 64, 506, 3935, 30072, 226247, 1681860, 12411486, 91384716, 671639928, 4929577344, 36146749703, 264885341958, 1940349607935, 14210290469006, 104055436365169, 761877093233402, 5577987879867728, 40836880075623272

Offset: 1

Author

R. H. Hardin, Nov 19 2014

Keywords

• nonn

Comments

Column 7 of A250351

Examples

			Some solutions for n=5
..2....3....1....0....2....5....3....5....1....1....5....7....4....6....1....0
..8....8....4....2....8....5....6....7....3....2....5....5....7....4....5....2
..5....4....2....5....9....2....8....8....2....2....6....5....8....5....9....2
..9....8....8....3....7....8...10....4...10....4....8...10....6....3....6...10
.10....4....8....8....5....4....4....8....4....8....4...10....7....9....6...10
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 96

Formula

Empirical recurrence of order 96 (see link above)