Sequences (Turyn's type) X,Y,Z,W which give base sequences of lengths 2n-1,2n-1,n,n, 
i.e. BS(3n-1), and thus T-sequences (T-matrices) of length 3n-1 
(and Hadamard matrices of order 4(3n-1)): The base sequences are constructed as follows: 

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A=Z;W,  B=Z;-W,  C=X,  D=Y of lengths 2n-1,2n-1,n,n.
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X = (+ + + - - - - + + - + - + - - - - - + + + + - + + - + + + + - - - - + -),
Y = (+ - + + + + + - - + - + - - + - - + + - - + + + + - + + + + - - - + + -),
Z = (+ - + + + + + - + - - + + + + - + + + - + + - - + + + - + - - + - - - +),
W = (+ + + - + - - - - - + + - - + - + + + - - + - + - + + + - + + + + - +).