A251942 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime

1462, 1182, 2272, 8937, 87011, 1086474, 14138322, 436167357, 12334046416, 356669730440, 35647683078113, 2204964623058818, 140143700163510981, 47432080346448287439, 6173305080134157592975, 856348374772825549372487

Offset

1,1

Comments

Diagonal of A251950

Links

Table of n, a(n) for n=1..16.

Example

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

Crossrefs

Sequence in context: A205316 A283493 A232347 * A251943 A251950 A023074

Adjacent sequences: A251939 A251940 A251941 * A251943 A251944 A251945

Keyword

nonn

Author

R. H. Hardin, Dec 11 2014

Status

approved