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A262755 Number of (n+2)X(4+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits. 1

%I #4 Sep 30 2015 11:00:49

%S 13,37,129,1645,8605,52993,658381,5747701,51979793,636258829,

%T 7230695309,80140442481,979582061773,12020681709477,143857668728353,

%U 1766744698318765,21995191160679549,270443634865041121

%N Number of (n+2)X(4+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

%C Column 4 of A262759.

%H R. H. Hardin, <a href="/A262755/b262755.txt">Table of n, a(n) for n = 1..195</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A262759.

%K nonn

%O 1,1

%A _R. H. Hardin_, Sep 30 2015

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Last modified April 24 10:11 EDT 2024. Contains 371935 sequences. (Running on oeis4.)