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Number of potential group developed cocyclic Hadamard matrices over Z_{(2*n+1)^2} X Z^2_2.
5

%I #21 Apr 12 2012 02:06:05

%S 8,398297088,913318229998415698350080000,

%T 18602466189203099377637961636627003234293304602017169408

%N Number of potential group developed cocyclic Hadamard matrices over Z_{(2*n+1)^2} X Z^2_2.

%H A. Baliga and K. J. Horadam, <a href="http://ajc.maths.uq.edu.au/pdf/11/ocr-ajc-v11-p123.pdf">Cocyclic Hadamard matrices over Z_t X Z^2_2</a>, Australas. J. Combin. 11(1995), 123-134.

%F a(n) = 8*A109901(2*n+1)^4 ([Baliga, et al., p. 130]).

%Y Cf. A109901.

%K nonn

%O 0,1

%A _L. Edson Jeffery_, Apr 11 2012