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%I #3 Aug 31 2015 07:16:28
%S 4,20,19,100,165,353,885,3548,8661,21544,78052,265612,786316,2171560,
%T 6063182,26625997,98070255,308244775
%N Number of (n+1)X(2+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 2 of A261761.
%e Some solutions for n=4
%e ..1..0..1....1..1..1....1..1..1....0..1..1....0..1..1....1..0..1....1..1..1
%e ..1..0..1....0..1..1....1..0..1....1..0..1....1..1..1....1..0..1....1..0..1
%e ..1..1..1....1..1..1....1..0..1....0..1..1....0..1..1....1..1..1....1..1..1
%e ..0..1..0....1..0..1....0..1..0....1..1..1....1..1..1....1..1..1....1..1..1
%e ..1..1..1....1..1..1....1..1..1....1..1..1....1..1..1....1..1..1....1..1..1
%Y Cf. A261761.
%K nonn
%O 1,1
%A _R. H. Hardin_, Aug 31 2015