login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Number of (5+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

%I #5 Jan 27 2022 22:37:30

%S 0,31,9350,50994,5488030,52973290,2828445617,58321826870

%N Number of (5+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 5 of A261942.

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A261942.

%K nonn

%O 1,2

%A _R. H. Hardin_, Sep 06 2015