A255712 Number of length n 1..(4+2) arrays with no leading partial sum equal to a prime and no consecutive values equal.

3, 8, 26, 81, 261, 936, 3435, 12406, 45637, 165303, 579197, 2056418, 7724487, 30188921, 117283664, 443965914, 1645885655, 6011641972, 21768376301, 79175516820, 293501032240, 1120198277690, 4414668160947, 17781778665225

Offset: 1

Author

R. H. Hardin, Mar 03 2015

Keywords

• nonn

Comments

Column 4 of A255716

Examples

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

Links

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

Crossrefs

Cf. A255716