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A262453 Number of (n+3)X(4+3) 0..1 arrays with each row and column divisible by 15, read as a binary number with top and left being the most significant bits. 1

%I #4 Sep 23 2015 08:46:18

%S 9,17,33,65,5961,17745,52961,158337,21044745,93470481,385241633,

%T 1550833729,89431824201,541972142417,2842025111009,14211894061697,

%U 407897039024649,3127520768485649,19675542077584929,115822243097610305

%N Number of (n+3)X(4+3) 0..1 arrays with each row and column divisible by 15, read as a binary number with top and left being the most significant bits.

%C Column 4 of A262457.

%H R. H. Hardin, <a href="/A262453/b262453.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%Y Cf. A262457.

%K nonn

%O 1,1

%A _R. H. Hardin_, Sep 23 2015

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Last modified March 28 16:12 EDT 2024. Contains 371254 sequences. (Running on oeis4.)