login
A251811
Number of (n+2)X(n+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime
0
345, 538, 1754, 22922, 504148, 17562309, 937980816, 77093723774, 9818091214983, 1923038551366940, 579363831610999841, 269256446506102900848, 192945586040744107579841, 212997867807414690141275523
OFFSET
1,1
COMMENTS
Diagonal of A251819
EXAMPLE
Some solutions for n=3
..0..1..1..0..1....1..0..2..0..0....1..1..0..1..1....1..0..2..0..0
..1..1..1..1..1....1..0..1..1..0....2..1..2..2..1....2..1..2..2..1
..1..1..1..1..1....1..2..2..1..2....2..0..0..2..0....0..1..1..0..1
..0..1..1..1..0....0..0..2..0..0....1..1..0..1..1....0..0..2..0..1
..1..1..0..1..1....1..0..1..1..0....2..1..2..2..1....2..1..2..2..1
CROSSREFS
Sequence in context: A306670 A251819 A251812 * A268145 A116347 A063370
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 09 2014
STATUS
approved