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Number of (3+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.
1

%I #4 Oct 03 2015 16:13:36

%S 27,132,1336,37635,771084,17912392,481968171,12572589132,333224229896,

%T 8994193541379,241857613967412,6515666351143848,175918432063803627,

%U 4747650731553770292,128153708240382030872,3460143599773663664643

%N Number of (3+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 3 of A262849.

%H R. H. Hardin, <a href="/A262852/b262852.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..0..0..0..1....0..0..0..1..1..1....0..1..0..1..0..1

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

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

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

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

%Y Cf. A262849.

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 03 2015