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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 0
5495, 16857, 94046, 1036785, 17612152, 615536028, 27379339268, 1766107726171, 234631571183388, 36199087873602624, 9632688371523308181 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A251885
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2014
STATUS
approved

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Last modified April 15 14:58 EDT 2024. Contains 371692 sequences. (Running on oeis4.)