%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