A254537 Number of length n 1..(6+2) arrays with no leading partial sum equal to a prime.

4, 20, 105, 576, 3383, 20393, 121774, 709169, 4121638, 24622476, 150895459, 928855881, 5659650136, 34105862488, 205228295685, 1249619101830, 7761595614134, 48955797807546, 308737202532449, 1916725035118260

Offset: 1

Author

R. H. Hardin, Feb 01 2015

Keywords

• nonn

Comments

Column 6 of A254539

Examples

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

Links

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