A254542 Number of length 4 1..(n+2) arrays with no leading partial sum equal to a prime

2, 20, 45, 160, 222, 576, 1026, 1849, 2461, 4195, 5217, 8052, 11098, 15300, 18210, 25269, 29296, 38791, 48468, 60634, 68591, 87149, 104149, 126729, 149195, 177607, 196492, 236417, 258581, 301770, 345756, 398586, 452724, 522973, 563863, 640216

Offset

1,1

Comments

Row 4 of A254539

Links

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

Example

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

Crossrefs

Sequence in context: A194999 A280436 A266842 * A202602 A097652 A261838

Adjacent sequences: A254539 A254540 A254541 * A254543 A254544 A254545

Keyword

nonn

Author

R. H. Hardin, Feb 01 2015

Status

approved