A251877 Number of (n+2)X(n+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime

5495, 16857, 94046, 1036785, 17612152, 615536028, 27379339268, 1766107726171, 234631571183388, 36199087873602624, 9632688371523308181

Offset

1,1

Comments

Diagonal of A251885

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=3
..0..1..1..0..4....0..0..3..0..4....1..1..1..3..1....4..0..3..0..0
..3..1..1..3..3....4..0..1..4..0....0..4..3..0..4....0..4..3..0..4
..4..0..3..4..0....1..3..1..3..3....4..0..3..4..0....3..1..1..3..1
..0..4..3..0..4....0..4..3..0..0....3..1..1..3..1....2..0..3..4..0
..3..1..1..3..1....4..0..3..0..0....0..4..1..0..2....0..2..1..0..1

Crossrefs

Sequence in context: A138760 A251885 A251878 * A252312 A247924 A031617

Adjacent sequences: A251874 A251875 A251876 * A251878 A251879 A251880

Keyword

nonn

Author

R. H. Hardin, Dec 10 2014

Status

approved