%I #3 Sep 06 2015 07:56:08

%S 0,2,61,147,1215,5826,28021,110420,527295,2326284,9514894,38982570,

%T 165423942,702887228,2961470604,11652281882,46921585497,193805455945

%N Number of (2+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.

%C Row 2 of A261942.

%e Some solutions for n=4

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

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

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

%Y Cf. A261942.

%K nonn

%O 1,2

%A _R. H. Hardin_, Sep 06 2015