A254219 Number of length 2 1..(n+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal.

0, 0, 0, 2, 2, 8, 12, 18, 18, 28, 28, 40, 50, 64, 64, 82, 82, 102, 118, 136, 136, 164, 182, 210, 232, 260, 260, 296, 296, 328, 356, 392, 424, 466, 466, 506, 542, 586, 586, 638, 638, 686, 728, 778, 778, 838, 884, 944, 994, 1050, 1050, 1118, 1168, 1236, 1290, 1352, 1352

Offset: 1

Author

R. H. Hardin, Jan 26 2015

Keywords

• nonn

Examples

			All solutions for n=4:
..6....4
..4....6
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 1..10000 (first 210 terms from R. H. Hardin)

Crossrefs

Row n=2 of A254218.