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A261936
Number of (n+1)X(n+1) 0..1 arrays with each row nonprime and column prime, read as a binary number with top and left being the most significant bits.
0
0, 2, 218, 7943, 5488030, 1247810761
OFFSET
1,2
COMMENTS
Diagonal of A261942.
EXAMPLE
Some solutions for n=4
..1..1..0..1..0....0..0..0..0..1....0..0..1..1..0....0..0..1..0..0
..1..1..1..0..0....1..1..0..0..0....1..0..1..0..0....1..0..0..0..0
..1..1..0..1..0....0..0..0..0..0....0..0..1..0..0....0..1..0..1..0
..0..1..1..1..1....1..1..1..1..0....1..1..0..0..1....1..0..1..0..1
..1..1..1..1..0....1..1..0..0..1....1..1..1..1..0....1..1..1..1..0
CROSSREFS
Cf. A261942.
Sequence in context: A239529 A101393 A124188 * A332568 A274466 A307511
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 06 2015
STATUS
approved