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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A261942.

LINKS

Table of n, a(n) for n=1..6.

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 * A274466 A307511 A293945

Adjacent sequences:  A261933 A261934 A261935 * A261937 A261938 A261939

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 06 2015

STATUS

approved

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Last modified October 16 15:18 EDT 2019. Contains 328101 sequences. (Running on oeis4.)