%I #4 Oct 03 2015 16:12:56
%S 13,34,196,3181,31050,352880,4679725,58693450,749598500,9769811821,
%T 126477115922,1640601801744,21334300812253,277222463778754,
%U 3602979823609668,46840315814579821,608897998235183514
%N Number of (2+2)X(n+2) 0..1 arrays with each row divisible by 7 and column not divisible by 7, read as a binary number with top and left being the most significant bits.
%C Row 2 of A262849.
%H R. H. Hardin, <a href="/A262851/b262851.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..1..1..1..1..1..1....1..1..1..1..1..1....0..1..1..1..0..0....0..1..1..1..0..0
%e ..1..0..1..0..1..0....0..1..0..1..0..1....0..0..0..1..1..1....0..0..0..0..0..0
%e ..1..0..1..0..1..0....0..0..0..1..1..1....1..1..0..0..0..1....1..1..0..0..0..1
%e ..1..0..1..0..1..0....0..1..0..1..0..1....0..1..1..1..0..0....1..1..1..1..1..1
%Y Cf. A262849.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 03 2015