A254212 Number of length n 1..(2+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.

2, 0, 1, 2, 2, 2, 2, 2, 5, 4, 5, 8, 31, 64, 83, 66, 60, 104, 158, 240, 846, 2990, 6296, 8440, 10213, 14034, 16843, 15538, 20339, 57766, 202098, 751354, 2575608, 6730882, 12332861, 15945860, 15602393, 13432584, 12250132, 12687426, 23661609, 144529800

Offset: 1

Author

R. H. Hardin, Jan 26 2015

Keywords

• nonn

Examples

			All solutions for n=4:
..4....1
..2....3
..3....2
..1....4
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..300 (first 51 terms from R. H. Hardin)

Crossrefs

Column k=2 of A254218.