A251878 Number of (n+2)X(1+2) 0..4 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime

5495, 11492, 20025, 49529, 117744, 256604, 676969, 1694929, 3850641, 10168955, 25657626, 58789576, 154405779, 390732438, 900368454, 2349009411, 5954768481, 13795315565, 35777536598, 90799627321, 211393940417, 545320046544

Offset

1,1

Comments

Column 1 of A251885

Links

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

Example

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

Crossrefs

Sequence in context: A137816 A138760 A251885 * A251877 A252312 A247924

Adjacent sequences: A251875 A251876 A251877 * A251879 A251880 A251881

Keyword

nonn

Author

R. H. Hardin, Dec 10 2014

Status

approved