A255719 Number of length 4 1..(n+2) arrays with no leading partial sum equal to a prime and no consecutive values equal.

1, 6, 21, 81, 120, 342, 653, 1221, 1729, 3037, 3884, 6136, 8650, 12056, 14580, 20505, 24083, 32191, 40684, 51184, 58455, 74807, 90133, 110175, 130476, 155925, 173529, 209720, 230413, 269673, 310187, 358492, 408861, 473591, 512204, 582744, 654517

Offset: 1

Author

R. H. Hardin, Mar 03 2015

Keywords

• nonn

Comments

Row 4 of A255716

Examples

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

Links

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

Crossrefs

Cf. A255716