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 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A251819 LINKS Table of n, a(n) for n=1..14. 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 Adjacent sequences: A251808 A251809 A251810 * A251812 A251813 A251814 KEYWORD nonn AUTHOR R. H. Hardin, Dec 09 2014 STATUS approved

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Last modified August 9 13:53 EDT 2024. Contains 375042 sequences. (Running on oeis4.)