A254207 Number of length 4 1..(n+2) arrays with no leading or trailing partial sum equal to a prime.

0, 6, 9, 54, 59, 195, 315, 676, 786, 1571, 1743, 3055, 4150, 6173, 6771, 10272, 11043, 15676, 19401, 25430, 27112, 36782, 43100, 54658, 63832, 78460, 83191, 105054, 110008, 132262, 150922, 178462, 201003, 239821, 249418, 289635, 323607, 372848

Offset

1,2

Links

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

Example

The a(2)=6 solutions are (1,3,2,4), (4,2,3,1), (4,2,2,4), (4,2,4,4), (4,4,2,4), and (4,4,4,4).

Crossrefs

Row n=4 of A254204.

Cf. A254218.

Sequence in context: A126110 A372499 A340819 * A098662 A056425 A056416

Adjacent sequences: A254204 A254205 A254206 * A254208 A254209 A254210

Keyword

nonn

Author

R. H. Hardin, Jan 26 2015

Status

approved