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A263032 Number of (n+2)X(n+2) 0..1 arrays with each row and column not divisible by 5, read as a binary number with top and left being the most significant bits. 0

%I #4 Oct 08 2015 07:50:53

%S 98,6928,2840827,4513054617,23445293636576,487724113265492752

%N Number of (n+2)X(n+2) 0..1 arrays with each row and column not divisible by 5, read as a binary number with top and left being the most significant bits.

%C Diagonal of A263040.

%e Some solutions for n=2

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

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

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

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

%Y Cf. A263040.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 08 2015

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Last modified April 30 15:48 EDT 2024. Contains 372134 sequences. (Running on oeis4.)