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 A261753 Number of (n+1)X(n+1) 0..1 arrays with each row and column prime, read as a binary number with top and left being the most significant bits. 0
 2, 20, 19, 2673, 7014, 8124875, 78901198 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A261761. LINKS Table of n, a(n) for n=1..7. EXAMPLE Some solutions for n=4 ..0..0..0..1..1....1..1..1..0..1....0..1..0..1..1....0..0..0..1..1 ..0..0..0..1..0....0..1..1..0..1....0..0..1..1..1....0..0..0..1..0 ..1..0..0..1..1....0..1..1..0..1....0..0..1..1..1....1..1..1..1..1 ..1..1..1..0..1....0..0..0..1..1....1..0..0..1..1....1..0..1..1..1 ..1..0..1..1..1....1..1..1..1..1....1..1..1..1..1....1..1..1..1..1 CROSSREFS Cf. A261761. Sequence in context: A343927 A221921 A012739 * A075031 A273466 A278938 Adjacent sequences: A261750 A261751 A261752 * A261754 A261755 A261756 KEYWORD nonn AUTHOR R. H. Hardin, Aug 31 2015 STATUS approved

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