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

1,2

Comments

Row 4 of A255716

Links

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

Example

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

Crossrefs

Cf. A255716

Sequence in context: A192144 A026628 A053768 * A134927 A108306 A199115

Adjacent sequences: A255716 A255717 A255718 * A255720 A255721 A255722

Keyword

nonn

Author

R. H. Hardin, Mar 03 2015

Status

approved