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A186064 Number of (n+2)X3 0..2 arrays with each 3X3 subblock having a positive determinant 1

%I #6 Mar 31 2012 12:36:04

%S 6396,85950,1119798,14499921,189215295,2464134402,32080884108,

%T 417846175365,5441672218326,70866667068072,922916034310758,

%U 12019300783493754,156529394078831076,2038511626441264185

%N Number of (n+2)X3 0..2 arrays with each 3X3 subblock having a positive determinant

%C Column 1 of A186068

%H R. H. Hardin, <a href="/A186064/b186064.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 4X3

%e ..2..2..1....0..0..2....0..2..1....1..0..2....2..1..2....0..1..1....1..0..2

%e ..1..0..2....2..1..0....2..0..0....2..2..2....0..1..1....2..1..2....2..1..0

%e ..1..0..1....1..2..2....2..2..0....0..0..2....1..1..2....2..1..0....2..2..1

%e ..0..2..2....1..0..2....1..1..1....2..0..2....2..0..0....1..1..0....1..2..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 11 2011

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)