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A262911 Number of (n+1)X(n+1) 0..1 arrays with each row divisible by 3 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

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%I A262911 #4 Oct 04 2015 10:09:22
%S A262911 1,3,15,137,18190,1550557,1282949605
%N A262911 Number of (n+1)X(n+1) 0..1 arrays with each row divisible by 3 and each column divisible by 7, read as a binary number with top and left being the most significant bits.
%C A262911 Diagonal of A262917.
%e A262911 Some solutions for n=4
%e A262911 ..0..1..0..0..1....1..0..0..1..0....0..0..0..0..0....0..1..1..0..0
%e A262911 ..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
%e A262911 ..0..1..1..1..1....1..1..1..1..0....0..1..1..1..1....0..1..1..0..0
%e A262911 ..0..0..1..1..0....0..1..1..0..0....0..1..1..1..1....0..0..0..0..0
%e A262911 ..0..1..1..1..1....1..1..1..1..0....0..1..1..1..1....0..1..1..0..0
%Y A262911 Cf. A262917.
%K A262911 nonn
%O A262911 1,2
%A A262911 _R. H. Hardin_, Oct 04 2015

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