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A251837 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime 1
974, 508, 1803, 5860, 79817, 1226031, 6811452, 332307262, 17060512419, 115557808374, 20390744213799, 3669049306262240, 27687623355417760, 18066638677524861299, 11720523110601342578534, 93975548122075184849030 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A251845
LINKS
EXAMPLE
Some solutions for n=4
..3..1..0..0..1..0....1..0..0..1..3..0....0..1..0..0..1..0....1..0..0..1..0..3
..0..1..0..3..1..0....3..3..0..1..0..0....1..2..1..1..2..1....2..1..1..2..1..1
..1..2..1..1..2..1....2..1..1..2..1..1....0..1..0..3..1..0....1..3..0..1..0..0
..0..1..0..0..1..0....1..0..3..1..0..0....0..1..0..0..1..3....1..0..0..1..0..0
..3..1..0..3..1..0....1..0..0..1..3..0....1..2..1..1..2..3....2..1..1..2..1..1
..1..2..1..1..2..1....2..1..1..2..1..1....0..1..0..0..1..0....1..0..0..1..0..0
CROSSREFS
Sequence in context: A209017 A232409 A275060 * A251838 A251845 A254072
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 09 2014
STATUS
approved

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Last modified July 23 19:43 EDT 2024. Contains 374553 sequences. (Running on oeis4.)