A254214 Number of length n 1..(4+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.

3, 2, 11, 22, 56, 136, 383, 1070, 3897, 13372, 36290, 91998, 263764, 898044, 3423582, 12431962, 40311611, 119109004, 342803738, 1087179458, 4009074487, 15810174070, 60200487014, 208013211868, 641452364953

Offset: 1

Author

R. H. Hardin, Jan 26 2015

Keywords

• nonn

Comments

Column 4 of A254218

Examples

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