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A182010 Number of potential group developed cocyclic Hadamard matrices over Z_{(2*n+1)^2} X Z^2_2. 5
8, 398297088, 913318229998415698350080000, 18602466189203099377637961636627003234293304602017169408 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..3.

A. Baliga and K. J. Horadam, Cocyclic Hadamard matrices over Z_t X Z^2_2, Australas. J. Combin. 11(1995), 123-134.

FORMULA

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

CROSSREFS

Cf. A109901.

Sequence in context: A076917 A076923 A076911 * A051269 A004740 A108067

Adjacent sequences:  A182007 A182008 A182009 * A182011 A182012 A182013

KEYWORD

nonn

AUTHOR

L. Edson Jeffery, Apr 11 2012

STATUS

approved

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Last modified April 23 18:15 EDT 2019. Contains 322387 sequences. (Running on oeis4.)