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A261756 Number of (n+1)X(3+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

%I

%S 0,19,19,99,138,197,380,2580,5892,10199,47851,139642,450312,1068661,

%T 2955411,13601486,48492065

%N Number of (n+1)X(3+1) 0..1 arrays with each row and column prime, read as a binary number with top and left being the most significant bits.

%C Column 3 of A261761.

%e Some solutions for n=4

%e ..0..0..1..1....0..0..1..0....1..1..0..1....0..0..1..1....0..0..1..1

%e ..1..0..1..1....0..0..1..0....1..1..0..1....0..0..1..1....0..0..1..0

%e ..0..0..1..1....0..1..1..1....1..1..0..1....1..0..1..1....0..0..1..0

%e ..1..1..0..1....1..1..0..1....0..0..1..1....0..1..1..1....1..1..0..1

%e ..1..0..1..1....0..1..1..1....1..1..0..1....1..0..1..1....0..0..1..1

%Y Cf. A261761.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 31 2015

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Last modified October 16 05:13 EDT 2021. Contains 348035 sequences. (Running on oeis4.)