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%I #13 Dec 17 2016 03:53:09
%S 1,1,1,1,4,3,36,294,6857010
%N Number of Hadamard matrices of order 4n when a matrix and its transpose are considered equivalent.
%C More precisely, number of inequivalent Hadamard matrices of order n if two matrices are considered equivalent if one can be obtained from the other by permuting rows, permuting columns, multiplying rows or columns by -1 and possibly transposing.
%C Computed from the tables on the linked website.
%H N. J. A. Sloane, <a href="http://neilsloane.com/hadamard/">Tables of Hadamard matrices</a>
%H <a href="/index/Ha#Hadamard">Index entries for sequences related to Hadamard matrices</a>
%Y Cf. A007299.
%K nonn,hard,more,nice
%O 0,5
%A _Ian Wanless_, Jul 28 2004
%E a(8) from _Brendan McKay_, Feb 11 2012
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